diff --git a/egs/aishell2/transformer/utils b/egs/aishell2/transformer/utils
deleted file mode 120000
index fe070dd3a..000000000
--- a/egs/aishell2/transformer/utils
+++ /dev/null
@@ -1 +0,0 @@
-../../aishell/transformer/utils
\ No newline at end of file
diff --git a/egs/aishell2/transformer/utils/__init__.py b/egs/aishell2/transformer/utils/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/egs/aishell2/transformer/utils/apply_cmvn.py b/egs/aishell2/transformer/utils/apply_cmvn.py
new file mode 100755
index 000000000..b5c5086b3
--- /dev/null
+++ b/egs/aishell2/transformer/utils/apply_cmvn.py
@@ -0,0 +1,79 @@
+from kaldiio import ReadHelper
+from kaldiio import WriteHelper
+
+import argparse
+import json
+import math
+import numpy as np
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="apply cmvn",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--ark-file",
+        "-a",
+        default=False,
+        required=True,
+        type=str,
+        help="fbank ark file",
+    )
+    parser.add_argument(
+        "--cmvn-file",
+        "-c",
+        default=False,
+        required=True,
+        type=str,
+        help="cmvn file",
+    )
+    parser.add_argument(
+        "--ark-index",
+        "-i",
+        default=1,
+        required=True,
+        type=int,
+        help="ark index",
+    )
+    parser.add_argument(
+        "--output-dir",
+        "-o",
+        default=False,
+        required=True,
+        type=str,
+        help="output dir",
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    ark_file = args.output_dir + "/feats." + str(args.ark_index) + ".ark"
+    scp_file = args.output_dir + "/feats." + str(args.ark_index) + ".scp"
+    ark_writer = WriteHelper('ark,scp:{},{}'.format(ark_file, scp_file))
+
+    with open(args.cmvn_file) as f:
+        cmvn_stats = json.load(f)
+
+    means = cmvn_stats['mean_stats']
+    vars = cmvn_stats['var_stats']
+    total_frames = cmvn_stats['total_frames']
+
+    for i in range(len(means)):
+        means[i] /= total_frames
+        vars[i] = vars[i] / total_frames - means[i] * means[i]
+        if vars[i] < 1.0e-20:
+            vars[i] = 1.0e-20
+        vars[i] = 1.0 / math.sqrt(vars[i])
+
+    with ReadHelper('ark:{}'.format(args.ark_file)) as ark_reader:
+        for key, mat in ark_reader:
+            mat = (mat - means) * vars
+            ark_writer(key, mat)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/egs/aishell2/transformer/utils/apply_cmvn.sh b/egs/aishell2/transformer/utils/apply_cmvn.sh
new file mode 100755
index 000000000..f8fd1d140
--- /dev/null
+++ b/egs/aishell2/transformer/utils/apply_cmvn.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+. ./path.sh || exit 1;
+# Begin configuration section.
+nj=32
+cmd=./utils/run.pl
+
+echo "$0 $@"
+
+. utils/parse_options.sh || exit 1;
+
+fbankdir=$1
+cmvn_file=$2
+logdir=$3
+output_dir=$4
+
+dump_dir=${output_dir}/ark; mkdir -p ${dump_dir}
+mkdir -p ${logdir}
+
+$cmd JOB=1:$nj $logdir/apply_cmvn.JOB.log \
+    python utils/apply_cmvn.py -a $fbankdir/ark/feats.JOB.ark \
+        -c $cmvn_file -i JOB -o ${dump_dir} \
+        || exit 1;
+
+for n in $(seq $nj); do
+    cat ${dump_dir}/feats.$n.scp || exit 1
+done > ${output_dir}/feats.scp || exit 1
+
+echo "$0: Succeeded apply cmvn"
diff --git a/egs/aishell2/transformer/utils/apply_lfr_and_cmvn.py b/egs/aishell2/transformer/utils/apply_lfr_and_cmvn.py
new file mode 100755
index 000000000..50d18d1a4
--- /dev/null
+++ b/egs/aishell2/transformer/utils/apply_lfr_and_cmvn.py
@@ -0,0 +1,143 @@
+from kaldiio import ReadHelper, WriteHelper
+
+import argparse
+import numpy as np
+
+
+def build_LFR_features(inputs, m=7, n=6):
+    LFR_inputs = []
+    T = inputs.shape[0]
+    T_lfr = int(np.ceil(T / n))
+    left_padding = np.tile(inputs[0], ((m - 1) // 2, 1))
+    inputs = np.vstack((left_padding, inputs))
+    T = T + (m - 1) // 2
+    for i in range(T_lfr):
+        if m <= T - i * n:
+            LFR_inputs.append(np.hstack(inputs[i * n:i * n + m]))
+        else:
+            num_padding = m - (T - i * n)
+            frame = np.hstack(inputs[i * n:])
+            for _ in range(num_padding):
+                frame = np.hstack((frame, inputs[-1]))
+            LFR_inputs.append(frame)
+    return np.vstack(LFR_inputs)
+
+
+def build_CMVN_features(inputs, mvn_file):  # noqa
+    with open(mvn_file, 'r', encoding='utf-8') as f:
+        lines = f.readlines()
+
+    add_shift_list = []
+    rescale_list = []
+    for i in range(len(lines)):
+        line_item = lines[i].split()
+        if line_item[0] == '<AddShift>':
+            line_item = lines[i + 1].split()
+            if line_item[0] == '<LearnRateCoef>':
+                add_shift_line = line_item[3:(len(line_item) - 1)]
+                add_shift_list = list(add_shift_line)
+                continue
+        elif line_item[0] == '<Rescale>':
+            line_item = lines[i + 1].split()
+            if line_item[0] == '<LearnRateCoef>':
+                rescale_line = line_item[3:(len(line_item) - 1)]
+                rescale_list = list(rescale_line)
+                continue
+
+    for j in range(inputs.shape[0]):
+        for k in range(inputs.shape[1]):
+            add_shift_value = add_shift_list[k]
+            rescale_value = rescale_list[k]
+            inputs[j, k] = float(inputs[j, k]) + float(add_shift_value)
+            inputs[j, k] = float(inputs[j, k]) * float(rescale_value)
+
+    return inputs
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="apply low_frame_rate and cmvn",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--ark-file",
+        "-a",
+        default=False,
+        required=True,
+        type=str,
+        help="fbank ark file",
+    )
+    parser.add_argument(
+        "--lfr",
+        "-f",
+        default=True,
+        type=str,
+        help="low frame rate",
+    )
+    parser.add_argument(
+        "--lfr-m",
+        "-m",
+        default=7,
+        type=int,
+        help="number of frames to stack",
+    )
+    parser.add_argument(
+        "--lfr-n",
+        "-n",
+        default=6,
+        type=int,
+        help="number of frames to skip",
+    )
+    parser.add_argument(
+        "--cmvn-file",
+        "-c",
+        default=False,
+        required=True,
+        type=str,
+        help="global cmvn file",
+    )
+    parser.add_argument(
+        "--ark-index",
+        "-i",
+        default=1,
+        required=True,
+        type=int,
+        help="ark index",
+    )
+    parser.add_argument(
+        "--output-dir",
+        "-o",
+        default=False,
+        required=True,
+        type=str,
+        help="output dir",
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    dump_ark_file = args.output_dir + "/feats." + str(args.ark_index) + ".ark"
+    dump_scp_file = args.output_dir + "/feats." + str(args.ark_index) + ".scp"
+    shape_file = args.output_dir + "/len." + str(args.ark_index)
+    ark_writer = WriteHelper('ark,scp:{},{}'.format(dump_ark_file, dump_scp_file))
+
+    shape_writer = open(shape_file, 'w')
+    with ReadHelper('ark:{}'.format(args.ark_file)) as ark_reader:
+        for key, mat in ark_reader:
+            if args.lfr:
+                lfr = build_LFR_features(mat, args.lfr_m, args.lfr_n)
+            else:
+                lfr = mat
+            cmvn = build_CMVN_features(lfr, args.cmvn_file)
+            dims = cmvn.shape[1]
+            lens = cmvn.shape[0]
+            shape_writer.write(key + " " + str(lens) + "," + str(dims) + '\n')
+            ark_writer(key, cmvn)
+
+
+if __name__ == '__main__':
+    main()
+
diff --git a/egs/aishell2/transformer/utils/apply_lfr_and_cmvn.sh b/egs/aishell2/transformer/utils/apply_lfr_and_cmvn.sh
new file mode 100755
index 000000000..3119fdb8f
--- /dev/null
+++ b/egs/aishell2/transformer/utils/apply_lfr_and_cmvn.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+
+# Begin configuration section.
+nj=32
+cmd=utils/run.pl
+
+# feature configuration
+lfr=True
+lfr_m=7
+lfr_n=6
+
+echo "$0 $@"
+
+. utils/parse_options.sh || exit 1;
+
+fbankdir=$1
+cmvn_file=$2
+logdir=$3
+output_dir=$4
+
+dump_dir=${output_dir}/ark; mkdir -p ${dump_dir}
+mkdir -p ${logdir}
+
+$cmd JOB=1:$nj $logdir/apply_lfr_and_cmvn.JOB.log \
+    python utils/apply_lfr_and_cmvn.py -a $fbankdir/ark/feats.JOB.ark \
+        -f $lfr -m $lfr_m -n $lfr_n -c $cmvn_file -i JOB -o ${dump_dir} \
+        || exit 1;
+
+for n in $(seq $nj); do
+    cat ${dump_dir}/feats.$n.scp || exit 1
+done > ${output_dir}/feats.scp || exit 1
+
+for n in $(seq $nj); do
+  cat ${dump_dir}/len.$n || exit 1
+done > ${output_dir}/speech_shape || exit 1
+
+echo "$0: Succeeded apply low frame rate and cmvn"
diff --git a/egs/aishell2/transformer/utils/cmvn_converter.py b/egs/aishell2/transformer/utils/cmvn_converter.py
new file mode 100644
index 000000000..d405d1290
--- /dev/null
+++ b/egs/aishell2/transformer/utils/cmvn_converter.py
@@ -0,0 +1,51 @@
+import argparse
+import json
+import numpy as np
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="cmvn converter",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--cmvn_json",
+        default=False,
+        required=True,
+        type=str,
+        help="cmvn json file",
+    )
+    parser.add_argument(
+        "--am_mvn",
+        default=False,
+        required=True,
+        type=str,
+        help="am mvn file",
+    )
+    return parser
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    with open(args.cmvn_json, "r") as fin:
+        cmvn_dict = json.load(fin)
+
+    mean_stats = np.array(cmvn_dict["mean_stats"])
+    var_stats = np.array(cmvn_dict["var_stats"])
+    total_frame = np.array(cmvn_dict["total_frames"])
+
+    mean = -1.0 * mean_stats / total_frame
+    var = 1.0 / np.sqrt(var_stats / total_frame - mean * mean)
+    dims = mean.shape[0]
+    with open(args.am_mvn, 'w') as fout:
+        fout.write("<Nnet>" + "\n" + "<Splice> " + str(dims) + " " + str(dims) + '\n' + "[ 0 ]" + "\n" + "<AddShift> " + str(dims) + " " + str(dims) + "\n")
+        mean_str = str(list(mean)).replace(',', '').replace('[', '[ ').replace(']', ' ]')
+        fout.write("<LearnRateCoef> 0 " + mean_str + '\n')
+        fout.write("<Rescale> " + str(dims) + " " + str(dims) + '\n')
+        var_str = str(list(var)).replace(',', '').replace('[', '[ ').replace(']', ' ]')
+        fout.write("<LearnRateCoef> 0 " + var_str + '\n')
+        fout.write("</Nnet>" + '\n')
+
+if __name__ == '__main__':
+    main()
diff --git a/egs/aishell2/transformer/utils/combine_cmvn_file.py b/egs/aishell2/transformer/utils/combine_cmvn_file.py
new file mode 100755
index 000000000..c52597372
--- /dev/null
+++ b/egs/aishell2/transformer/utils/combine_cmvn_file.py
@@ -0,0 +1,72 @@
+import argparse
+import json
+import os
+
+import numpy as np
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="combine cmvn file",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--dim",
+        default=80,
+        type=int,
+        help="feature dim",
+    )
+    parser.add_argument(
+        "--cmvn_dir",
+        default=False,
+        required=True,
+        type=str,
+        help="cmvn dir",
+    )
+
+    parser.add_argument(
+        "--nj",
+        default=1,
+        required=True,
+        type=int,
+        help="num of cmvn files",
+    )
+    parser.add_argument(
+        "--output_dir",
+        default=False,
+        required=True,
+        type=str,
+        help="output dir",
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    total_means = np.zeros(args.dim)
+    total_vars = np.zeros(args.dim)
+    total_frames = 0
+
+    cmvn_file = os.path.join(args.output_dir, "cmvn.json")
+
+    for i in range(1, args.nj + 1):
+        with open(os.path.join(args.cmvn_dir, "cmvn.{}.json".format(str(i)))) as fin:
+            cmvn_stats = json.load(fin)
+
+        total_means += np.array(cmvn_stats["mean_stats"])
+        total_vars += np.array(cmvn_stats["var_stats"])
+        total_frames += cmvn_stats["total_frames"]
+
+    cmvn_info = {
+        'mean_stats': list(total_means.tolist()),
+        'var_stats': list(total_vars.tolist()),
+        'total_frames': total_frames
+    }
+    with open(cmvn_file, 'w') as fout:
+        fout.write(json.dumps(cmvn_info))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/egs/aishell2/transformer/utils/compute_cmvn.py b/egs/aishell2/transformer/utils/compute_cmvn.py
new file mode 100755
index 000000000..949cc084c
--- /dev/null
+++ b/egs/aishell2/transformer/utils/compute_cmvn.py
@@ -0,0 +1,104 @@
+import argparse
+import json
+import os
+
+import numpy as np
+import torchaudio
+import torchaudio.compliance.kaldi as kaldi
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="computer global cmvn",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--dim",
+        default=80,
+        type=int,
+        help="feature dimension",
+    )
+    parser.add_argument(
+        "--wav_path",
+        default=False,
+        required=True,
+        type=str,
+        help="the path of wav scps",
+    )
+    parser.add_argument(
+        "--idx",
+        default=1,
+        required=True,
+        type=int,
+        help="index",
+    )
+    return parser
+
+
+def compute_fbank(wav_file,
+                  num_mel_bins=80,
+                  frame_length=25,
+                  frame_shift=10,
+                  dither=0.0,
+                  resample_rate=16000,
+                  speed=1.0,
+                  window_type="hamming"):
+    waveform, sample_rate = torchaudio.load(wav_file)
+    if resample_rate != sample_rate:
+        waveform = torchaudio.transforms.Resample(orig_freq=sample_rate,
+                                                  new_freq=resample_rate)(waveform)
+    if speed != 1.0:
+        waveform, _ = torchaudio.sox_effects.apply_effects_tensor(
+            waveform, resample_rate,
+            [['speed', str(speed)], ['rate', str(resample_rate)]]
+        )
+
+    waveform = waveform * (1 << 15)
+    mat = kaldi.fbank(waveform,
+                      num_mel_bins=num_mel_bins,
+                      frame_length=frame_length,
+                      frame_shift=frame_shift,
+                      dither=dither,
+                      energy_floor=0.0,
+                      window_type=window_type,
+                      sample_frequency=resample_rate)
+
+    return mat.numpy()
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    wav_scp_file = os.path.join(args.wav_path, "wav.{}.scp".format(args.idx))
+    cmvn_file = os.path.join(args.wav_path, "cmvn.{}.json".format(args.idx))
+
+    mean_stats = np.zeros(args.dim)
+    var_stats = np.zeros(args.dim)
+    total_frames = 0
+
+    # with ReadHelper('ark:{}'.format(ark_file)) as ark_reader:
+    #     for key, mat in ark_reader:
+    #         mean_stats += np.sum(mat, axis=0)
+    #         var_stats += np.sum(np.square(mat), axis=0)
+    #         total_frames += mat.shape[0]
+    with open(wav_scp_file) as f:
+        lines = f.readlines()
+        for line in lines:
+            _, wav_file = line.strip().split()
+            fbank = compute_fbank(wav_file, num_mel_bins=args.dim)
+            mean_stats += np.sum(fbank, axis=0)
+            var_stats += np.sum(np.square(fbank), axis=0)
+            total_frames += fbank.shape[0]
+
+    cmvn_info = {
+        'mean_stats': list(mean_stats.tolist()),
+        'var_stats': list(var_stats.tolist()),
+        'total_frames': total_frames
+    }
+    with open(cmvn_file, 'w') as fout:
+        fout.write(json.dumps(cmvn_info))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/egs/aishell2/transformer/utils/compute_cmvn.sh b/egs/aishell2/transformer/utils/compute_cmvn.sh
new file mode 100755
index 000000000..7663df992
--- /dev/null
+++ b/egs/aishell2/transformer/utils/compute_cmvn.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+. ./path.sh || exit 1;
+# Begin configuration section.
+nj=32
+cmd=./utils/run.pl
+feats_dim=80
+
+echo "$0 $@"
+
+. utils/parse_options.sh || exit 1;
+
+fbankdir=$1
+
+split_dir=${fbankdir}/cmvn/split_${nj};
+mkdir -p $split_dir
+split_scps=""
+for n in $(seq $nj); do
+    split_scps="$split_scps $split_dir/wav.$n.scp"
+done
+utils/split_scp.pl ${fbankdir}/wav.scp $split_scps || exit 1;
+
+logdir=${fbankdir}/cmvn/log
+$cmd JOB=1:$nj $logdir/cmvn.JOB.log \
+    python utils/compute_cmvn.py \
+      --dim ${feats_dim} \
+      --wav_path $split_dir \
+      --idx JOB
+
+python utils/combine_cmvn_file.py --dim ${feats_dim} --cmvn_dir $split_dir --nj $nj --output_dir ${fbankdir}/cmvn
+
+python utils/cmvn_converter.py --cmvn_json ${fbankdir}/cmvn/cmvn.json --am_mvn ${fbankdir}/cmvn/cmvn.mvn
+
+echo "$0: Succeeded compute global cmvn"
diff --git a/egs/aishell2/transformer/utils/compute_fbank.py b/egs/aishell2/transformer/utils/compute_fbank.py
new file mode 100755
index 000000000..9c3904f78
--- /dev/null
+++ b/egs/aishell2/transformer/utils/compute_fbank.py
@@ -0,0 +1,171 @@
+from kaldiio import WriteHelper
+
+import argparse
+import numpy as np
+import json
+import torch
+import torchaudio
+import torchaudio.compliance.kaldi as kaldi
+
+
+def compute_fbank(wav_file,
+                  num_mel_bins=80,
+                  frame_length=25,
+                  frame_shift=10,
+                  dither=0.0,
+                  resample_rate=16000,
+                  speed=1.0,
+                  window_type="hamming"):
+
+    waveform, sample_rate = torchaudio.load(wav_file)
+    if resample_rate != sample_rate:
+        waveform = torchaudio.transforms.Resample(orig_freq=sample_rate,
+                                                  new_freq=resample_rate)(waveform)
+    if speed != 1.0:
+        waveform, _ = torchaudio.sox_effects.apply_effects_tensor(
+            waveform, resample_rate,
+            [['speed', str(speed)], ['rate', str(resample_rate)]]
+        )
+
+    waveform = waveform * (1 << 15)
+    mat = kaldi.fbank(waveform,
+                      num_mel_bins=num_mel_bins,
+                      frame_length=frame_length,
+                      frame_shift=frame_shift,
+                      dither=dither,
+                      energy_floor=0.0,
+                      window_type=window_type,
+                      sample_frequency=resample_rate)
+
+    return mat.numpy()
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="computer features",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--wav-lists",
+        "-w",
+        default=False,
+        required=True,
+        type=str,
+        help="input wav lists",
+    )
+    parser.add_argument(
+        "--text-files",
+        "-t",
+        default=False,
+        required=True,
+        type=str,
+        help="input text files",
+    )
+    parser.add_argument(
+        "--dims",
+        "-d",
+        default=80,
+        type=int,
+        help="feature dims",
+    )
+    parser.add_argument(
+        "--max-lengths",
+        "-m",
+        default=1500,
+        type=int,
+        help="max frame numbers",
+    )
+    parser.add_argument(
+        "--sample-frequency",
+        "-s",
+        default=16000,
+        type=int,
+        help="sample frequency",
+    )
+    parser.add_argument(
+        "--speed-perturb",
+        "-p",
+        default="1.0",
+        type=str,
+        help="speed perturb",
+    )
+    parser.add_argument(
+        "--ark-index",
+        "-a",
+        default=1,
+        required=True,
+        type=int,
+        help="ark index",
+    )
+    parser.add_argument(
+        "--output-dir",
+        "-o",
+        default=False,
+        required=True,
+        type=str,
+        help="output dir",
+    )
+    parser.add_argument(
+        "--window-type",
+        default="hamming",
+        required=False,
+        type=str,
+        help="window type"
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    ark_file = args.output_dir + "/ark/feats." + str(args.ark_index) + ".ark"
+    scp_file = args.output_dir + "/ark/feats." + str(args.ark_index) + ".scp"
+    text_file = args.output_dir + "/txt/text." + str(args.ark_index) + ".txt"  
+    feats_shape_file = args.output_dir + "/ark/len." + str(args.ark_index)
+    text_shape_file = args.output_dir + "/txt/len." + str(args.ark_index)
+
+    ark_writer = WriteHelper('ark,scp:{},{}'.format(ark_file, scp_file))
+    text_writer = open(text_file, 'w')
+    feats_shape_writer = open(feats_shape_file, 'w')
+    text_shape_writer = open(text_shape_file, 'w')
+
+    speed_perturb_list = args.speed_perturb.split(',')
+    
+    for speed in speed_perturb_list:
+        with open(args.wav_lists, 'r', encoding='utf-8') as wavfile:
+            with open(args.text_files, 'r', encoding='utf-8') as textfile:
+                for wav, text in zip(wavfile, textfile): 
+                    s_w = wav.strip().split()
+                    wav_id = s_w[0]
+                    wav_file = s_w[1]
+
+                    s_t = text.strip().split()
+                    text_id = s_t[0]
+                    txt = s_t[1:]
+                    fbank = compute_fbank(wav_file,
+                                          num_mel_bins=args.dims,
+                                          resample_rate=args.sample_frequency,
+                                          speed=float(speed),
+                                          window_type=args.window_type
+                                          )
+                    feats_dims = fbank.shape[1]
+                    feats_lens = fbank.shape[0]
+                    if feats_lens >= args.max_lengths:
+                        continue
+                    txt_lens = len(txt)
+                    if speed == "1.0":
+                        wav_id_sp = wav_id
+                    else: 
+                        wav_id_sp = wav_id + "_sp" + speed
+
+                    feats_shape_writer.write(wav_id_sp + " " + str(feats_lens) + "," + str(feats_dims) + '\n')
+                    text_shape_writer.write(wav_id_sp + " " + str(txt_lens) + '\n')
+
+                    text_writer.write(wav_id_sp + " " + " ".join(txt) + '\n')
+                    ark_writer(wav_id_sp, fbank)
+                    
+
+if __name__ == '__main__':
+    main()
+
diff --git a/egs/aishell2/transformer/utils/compute_fbank.sh b/egs/aishell2/transformer/utils/compute_fbank.sh
new file mode 100755
index 000000000..8704b313c
--- /dev/null
+++ b/egs/aishell2/transformer/utils/compute_fbank.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+. ./path.sh || exit 1;
+# Begin configuration section.
+nj=32
+cmd=./utils/run.pl
+
+# feature configuration
+feats_dim=80
+sample_frequency=16000
+speed_perturb="1.0"
+window_type="hamming"
+max_lengths=1500
+
+echo "$0 $@"
+
+. utils/parse_options.sh || exit 1;
+
+data=$1
+logdir=$2
+fbankdir=$3
+
+[ ! -f $data/wav.scp ] && echo "$0: no such file $data/wav.scp" && exit 1;
+[ ! -f $data/text ] && echo "$0: no such file $data/text" && exit 1;
+
+python utils/split_data.py $data $data $nj
+
+ark_dir=${fbankdir}/ark; mkdir -p ${ark_dir}
+text_dir=${fbankdir}/txt; mkdir -p ${text_dir}
+mkdir -p ${logdir}
+
+$cmd JOB=1:$nj $logdir/make_fbank.JOB.log \
+    python utils/compute_fbank.py -w $data/split${nj}/JOB/wav.scp -t $data/split${nj}/JOB/text \
+        -d $feats_dim -s $sample_frequency -m ${max_lengths} -p ${speed_perturb} -a JOB -o ${fbankdir} \
+        --window-type ${window_type} \
+        || exit 1;
+
+for n in $(seq $nj); do
+    cat ${ark_dir}/feats.$n.scp || exit 1
+done > $fbankdir/feats.scp || exit 1
+
+for n in $(seq $nj); do
+    cat ${text_dir}/text.$n.txt || exit 1
+done > $fbankdir/text || exit 1
+
+for n in $(seq $nj); do
+    cat ${ark_dir}/len.$n || exit 1
+done > $fbankdir/speech_shape || exit 1
+
+for n in $(seq $nj); do
+    cat ${text_dir}/len.$n || exit 1
+done > $fbankdir/text_shape || exit 1
+
+echo "$0: Succeeded compute FBANK features"
diff --git a/egs/aishell2/transformer/utils/compute_wer.py b/egs/aishell2/transformer/utils/compute_wer.py
new file mode 100755
index 000000000..26a9f491f
--- /dev/null
+++ b/egs/aishell2/transformer/utils/compute_wer.py
@@ -0,0 +1,157 @@
+import os
+import numpy as np
+import sys
+
+def compute_wer(ref_file,
+                hyp_file,
+                cer_detail_file):
+    rst = {
+        'Wrd': 0,
+        'Corr': 0,
+        'Ins': 0,
+        'Del': 0,
+        'Sub': 0,
+        'Snt': 0,
+        'Err': 0.0,
+        'S.Err': 0.0,
+        'wrong_words': 0,
+        'wrong_sentences': 0
+    }
+
+    hyp_dict = {}
+    ref_dict = {}
+    with open(hyp_file, 'r') as hyp_reader:
+        for line in hyp_reader:
+            key = line.strip().split()[0]
+            value = line.strip().split()[1:]
+            hyp_dict[key] = value
+    with open(ref_file, 'r') as ref_reader:
+        for line in ref_reader:
+            key = line.strip().split()[0]
+            value = line.strip().split()[1:]
+            ref_dict[key] = value
+
+    cer_detail_writer = open(cer_detail_file, 'w')
+    for hyp_key in hyp_dict:
+        if hyp_key in ref_dict:
+           out_item = compute_wer_by_line(hyp_dict[hyp_key], ref_dict[hyp_key])
+           rst['Wrd'] += out_item['nwords']
+           rst['Corr'] += out_item['cor']
+           rst['wrong_words'] += out_item['wrong']
+           rst['Ins'] += out_item['ins']
+           rst['Del'] += out_item['del']
+           rst['Sub'] += out_item['sub']
+           rst['Snt'] += 1
+           if out_item['wrong'] > 0:
+               rst['wrong_sentences'] += 1
+           cer_detail_writer.write(hyp_key + print_cer_detail(out_item) + '\n')
+           cer_detail_writer.write("ref:" + '\t' + " ".join(list(map(lambda x: x.lower(), ref_dict[hyp_key]))) + '\n')
+           cer_detail_writer.write("hyp:" + '\t' + " ".join(list(map(lambda x: x.lower(), hyp_dict[hyp_key]))) + '\n')
+
+    if rst['Wrd'] > 0:
+        rst['Err'] = round(rst['wrong_words'] * 100 / rst['Wrd'], 2)
+    if rst['Snt'] > 0:
+        rst['S.Err'] = round(rst['wrong_sentences'] * 100 / rst['Snt'], 2)
+
+    cer_detail_writer.write('\n')
+    cer_detail_writer.write("%WER " + str(rst['Err']) + " [ " + str(rst['wrong_words'])+ " / " + str(rst['Wrd']) +
+                            ", " + str(rst['Ins']) + " ins, " + str(rst['Del']) + " del, " + str(rst['Sub']) + " sub ]" + '\n')
+    cer_detail_writer.write("%SER " + str(rst['S.Err']) + " [ " + str(rst['wrong_sentences']) + " / " + str(rst['Snt']) + " ]" + '\n')
+    cer_detail_writer.write("Scored " + str(len(hyp_dict)) + " sentences, " + str(len(hyp_dict) - rst['Snt']) + " not present in hyp." + '\n')
+
+     
+def compute_wer_by_line(hyp,
+                        ref):
+    hyp = list(map(lambda x: x.lower(), hyp))
+    ref = list(map(lambda x: x.lower(), ref))
+
+    len_hyp = len(hyp)
+    len_ref = len(ref)
+
+    cost_matrix = np.zeros((len_hyp + 1, len_ref + 1), dtype=np.int16)
+
+    ops_matrix = np.zeros((len_hyp + 1, len_ref + 1), dtype=np.int8)
+
+    for i in range(len_hyp + 1):
+        cost_matrix[i][0] = i
+    for j in range(len_ref + 1):
+        cost_matrix[0][j] = j
+
+    for i in range(1, len_hyp + 1):
+        for j in range(1, len_ref + 1):
+            if hyp[i - 1] == ref[j - 1]:
+                cost_matrix[i][j] = cost_matrix[i - 1][j - 1]
+            else:
+                substitution = cost_matrix[i - 1][j - 1] + 1
+                insertion = cost_matrix[i - 1][j] + 1
+                deletion = cost_matrix[i][j - 1] + 1
+
+                compare_val = [substitution, insertion, deletion]
+
+                min_val = min(compare_val)
+                operation_idx = compare_val.index(min_val) + 1
+                cost_matrix[i][j] = min_val
+                ops_matrix[i][j] = operation_idx
+
+    match_idx = []
+    i = len_hyp
+    j = len_ref
+    rst = {
+        'nwords': len_ref,
+        'cor': 0,
+        'wrong': 0,
+        'ins': 0,
+        'del': 0,
+        'sub': 0
+    }
+    while i >= 0 or j >= 0:
+        i_idx = max(0, i)
+        j_idx = max(0, j)
+
+        if ops_matrix[i_idx][j_idx] == 0:  # correct
+            if i - 1 >= 0 and j - 1 >= 0:
+                match_idx.append((j - 1, i - 1))
+                rst['cor'] += 1
+
+            i -= 1
+            j -= 1
+
+        elif ops_matrix[i_idx][j_idx] == 2:  # insert
+            i -= 1
+            rst['ins'] += 1
+
+        elif ops_matrix[i_idx][j_idx] == 3:  # delete
+            j -= 1
+            rst['del'] += 1
+
+        elif ops_matrix[i_idx][j_idx] == 1:  # substitute
+            i -= 1
+            j -= 1
+            rst['sub'] += 1
+
+        if i < 0 and j >= 0:
+            rst['del'] += 1
+        elif j < 0 and i >= 0:
+            rst['ins'] += 1
+
+    match_idx.reverse()
+    wrong_cnt = cost_matrix[len_hyp][len_ref]
+    rst['wrong'] = wrong_cnt
+
+    return rst
+
+def print_cer_detail(rst):
+    return ("(" + "nwords=" + str(rst['nwords']) + ",cor=" + str(rst['cor'])
+            + ",ins=" + str(rst['ins']) + ",del=" + str(rst['del']) + ",sub="
+            + str(rst['sub']) + ") corr:" + '{:.2%}'.format(rst['cor']/rst['nwords'])
+            + ",cer:" + '{:.2%}'.format(rst['wrong']/rst['nwords']))
+
+if __name__ == '__main__':
+    if len(sys.argv) != 4:
+        print("usage : python compute-wer.py test.ref test.hyp test.wer")
+        sys.exit(0)
+
+    ref_file = sys.argv[1]
+    hyp_file = sys.argv[2]
+    cer_detail_file = sys.argv[3]
+    compute_wer(ref_file, hyp_file, cer_detail_file)
diff --git a/egs/aishell2/transformer/utils/download_model.py b/egs/aishell2/transformer/utils/download_model.py
new file mode 100755
index 000000000..70ea17965
--- /dev/null
+++ b/egs/aishell2/transformer/utils/download_model.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+import argparse
+
+from modelscope.pipelines import pipeline
+from modelscope.utils.constant import Tasks
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(
+        description="download model configs",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument("--model_name",
+                        type=str,
+                        default="damo/speech_data2vec_pretrain-zh-cn-aishell2-16k-pytorch",
+                        help="model name in ModelScope")
+    args = parser.parse_args()
+
+    inference_pipeline = pipeline(
+        task=Tasks.auto_speech_recognition,
+        model=args.model_name)
diff --git a/egs/aishell2/transformer/utils/error_rate_zh b/egs/aishell2/transformer/utils/error_rate_zh
new file mode 100755
index 000000000..6871a07fa
--- /dev/null
+++ b/egs/aishell2/transformer/utils/error_rate_zh
@@ -0,0 +1,370 @@
+#!/usr/bin/env python3
+# coding=utf8
+
+# Copyright  2021  Jiayu DU
+
+import sys
+import argparse
+import json
+import logging
+logging.basicConfig(stream=sys.stderr, level=logging.INFO, format='[%(levelname)s] %(message)s')
+
+DEBUG = None
+
+def GetEditType(ref_token, hyp_token):
+    if ref_token == None and hyp_token != None:
+        return 'I'
+    elif ref_token != None and hyp_token == None:
+        return 'D'
+    elif ref_token == hyp_token:
+        return 'C'
+    elif ref_token != hyp_token:
+        return 'S'
+    else:
+        raise RuntimeError
+
+class AlignmentArc:
+    def __init__(self, src, dst, ref, hyp):
+        self.src = src
+        self.dst = dst
+        self.ref = ref
+        self.hyp = hyp
+        self.edit_type = GetEditType(ref, hyp)
+
+def similarity_score_function(ref_token, hyp_token):
+    return 0 if (ref_token == hyp_token) else -1.0
+
+def insertion_score_function(token):
+    return -1.0
+
+def deletion_score_function(token):
+    return -1.0
+
+def EditDistance(
+        ref,
+        hyp, 
+        similarity_score_function = similarity_score_function,
+        insertion_score_function = insertion_score_function,
+        deletion_score_function = deletion_score_function):
+    assert(len(ref) != 0)
+    class DPState:
+        def __init__(self):
+            self.score = -float('inf')
+            # backpointer
+            self.prev_r = None
+            self.prev_h = None
+    
+    def print_search_grid(S, R, H, fstream):
+        print(file=fstream)
+        for r in range(R):
+            for h in range(H):
+                print(F'[{r},{h}]:{S[r][h].score:4.3f}:({S[r][h].prev_r},{S[r][h].prev_h}) ', end='', file=fstream)
+            print(file=fstream)
+
+    R = len(ref) + 1
+    H = len(hyp) + 1
+
+    # Construct DP search space, a (R x H) grid
+    S = [ [] for r in range(R) ]
+    for r in range(R):
+        S[r] = [ DPState() for x in range(H) ]
+
+    # initialize DP search grid origin, S(r = 0, h = 0)
+    S[0][0].score = 0.0
+    S[0][0].prev_r = None
+    S[0][0].prev_h = None
+
+    # initialize REF axis
+    for r in range(1, R):
+        S[r][0].score = S[r-1][0].score + deletion_score_function(ref[r-1])
+        S[r][0].prev_r = r-1
+        S[r][0].prev_h = 0
+
+    # initialize HYP axis
+    for h in range(1, H):
+        S[0][h].score = S[0][h-1].score + insertion_score_function(hyp[h-1])
+        S[0][h].prev_r = 0
+        S[0][h].prev_h = h-1
+
+    best_score = S[0][0].score
+    best_state = (0, 0)
+
+    for r in range(1, R):
+        for h in range(1, H):
+            sub_or_cor_score = similarity_score_function(ref[r-1], hyp[h-1])
+            new_score = S[r-1][h-1].score + sub_or_cor_score
+            if new_score >= S[r][h].score:
+                S[r][h].score = new_score
+                S[r][h].prev_r = r-1
+                S[r][h].prev_h = h-1
+
+            del_score = deletion_score_function(ref[r-1])
+            new_score = S[r-1][h].score + del_score
+            if new_score >= S[r][h].score:
+                S[r][h].score = new_score
+                S[r][h].prev_r = r - 1
+                S[r][h].prev_h = h
+
+            ins_score = insertion_score_function(hyp[h-1])
+            new_score = S[r][h-1].score + ins_score
+            if new_score >= S[r][h].score:
+                S[r][h].score = new_score
+                S[r][h].prev_r = r
+                S[r][h].prev_h = h-1
+
+    best_score = S[R-1][H-1].score
+    best_state = (R-1, H-1)
+
+    if DEBUG:
+        print_search_grid(S, R, H, sys.stderr)
+
+    # Backtracing best alignment path, i.e. a list of arcs
+    # arc = (src, dst, ref, hyp, edit_type)
+    # src/dst = (r, h), where r/h refers to search grid state-id along Ref/Hyp axis
+    best_path = []
+    r, h = best_state[0], best_state[1]
+    prev_r, prev_h = S[r][h].prev_r, S[r][h].prev_h
+    score = S[r][h].score
+    # loop invariant:
+    #   1. (prev_r, prev_h) -> (r, h) is a "forward arc" on best alignment path
+    #   2. score is the value of point(r, h) on DP search grid
+    while prev_r != None or prev_h != None:
+        src = (prev_r, prev_h)
+        dst = (r, h)
+        if (r == prev_r + 1 and h == prev_h + 1): # Substitution or correct
+            arc = AlignmentArc(src, dst, ref[prev_r], hyp[prev_h])
+        elif (r == prev_r + 1 and h == prev_h): # Deletion
+            arc = AlignmentArc(src, dst, ref[prev_r], None)
+        elif (r == prev_r and h == prev_h + 1): # Insertion
+            arc = AlignmentArc(src, dst, None, hyp[prev_h])
+        else:
+            raise RuntimeError
+        best_path.append(arc)
+        r, h = prev_r, prev_h
+        prev_r, prev_h = S[r][h].prev_r, S[r][h].prev_h
+        score = S[r][h].score
+    
+    best_path.reverse()
+    return (best_path, best_score)
+
+def PrettyPrintAlignment(alignment, stream = sys.stderr):
+    def get_token_str(token):
+        if token == None:
+            return "*"
+        return token
+    
+    def is_double_width_char(ch):
+        if (ch >= '\u4e00') and (ch <= '\u9fa5'): # codepoint ranges for Chinese chars
+            return True
+        # TODO: support other double-width-char language such as Japanese, Korean 
+        else:
+            return False
+    
+    def display_width(token_str):
+        m = 0
+        for c in token_str:
+            if is_double_width_char(c):
+                m += 2
+            else:
+                m += 1
+        return m
+
+    R = '  REF  : '
+    H = '  HYP  : '
+    E = '  EDIT : '
+    for arc in alignment:
+        r = get_token_str(arc.ref)
+        h = get_token_str(arc.hyp)
+        e = arc.edit_type if arc.edit_type != 'C' else ''
+
+        nr, nh, ne = display_width(r), display_width(h), display_width(e)
+        n = max(nr, nh, ne) + 1
+
+        R += r + ' ' * (n-nr)
+        H += h + ' ' * (n-nh)
+        E += e + ' ' * (n-ne)
+
+    print(R, file=stream)
+    print(H, file=stream)
+    print(E, file=stream)
+
+def CountEdits(alignment):
+    c, s, i, d = 0, 0, 0, 0
+    for arc in alignment:
+        if arc.edit_type == 'C':
+            c += 1
+        elif arc.edit_type == 'S':
+            s += 1
+        elif arc.edit_type == 'I':
+            i += 1
+        elif arc.edit_type == 'D':
+            d += 1
+        else:
+            raise RuntimeError
+    return (c, s, i, d)
+
+def ComputeTokenErrorRate(c, s, i, d):
+    return 100.0 * (s + d + i) / (s + d + c)
+
+def ComputeSentenceErrorRate(num_err_utts, num_utts):
+    assert(num_utts != 0)
+    return 100.0 * num_err_utts / num_utts
+
+
+class EvaluationResult:
+    def __init__(self):
+        self.num_ref_utts = 0
+        self.num_hyp_utts = 0
+        self.num_eval_utts = 0 # seen in both ref & hyp
+        self.num_hyp_without_ref = 0
+
+        self.C = 0
+        self.S = 0
+        self.I = 0
+        self.D = 0
+        self.token_error_rate = 0.0
+
+        self.num_utts_with_error = 0
+        self.sentence_error_rate = 0.0
+    
+    def to_json(self):
+        return json.dumps(self.__dict__)
+    
+    def to_kaldi(self):
+        info = (
+            F'%WER {self.token_error_rate:.2f} [ {self.S + self.D + self.I} / {self.C + self.S + self.D}, {self.I} ins, {self.D} del, {self.S} sub ]\n'
+            F'%SER {self.sentence_error_rate:.2f} [ {self.num_utts_with_error} / {self.num_eval_utts} ]\n'
+        )
+        return info
+    
+    def to_sclite(self):
+        return "TODO"
+    
+    def to_espnet(self):
+        return "TODO"
+    
+    def to_summary(self):
+        #return json.dumps(self.__dict__, indent=4)
+        summary = (
+            '==================== Overall Statistics ====================\n'
+            F'num_ref_utts: {self.num_ref_utts}\n'
+            F'num_hyp_utts: {self.num_hyp_utts}\n'
+            F'num_hyp_without_ref: {self.num_hyp_without_ref}\n'
+            F'num_eval_utts: {self.num_eval_utts}\n'
+            F'sentence_error_rate: {self.sentence_error_rate:.2f}%\n'
+            F'token_error_rate: {self.token_error_rate:.2f}%\n'
+            F'token_stats:\n'
+            F'  - tokens:{self.C + self.S + self.D:>7}\n'
+            F'  - edits: {self.S + self.I + self.D:>7}\n'
+            F'  - cor:   {self.C:>7}\n'
+            F'  - sub:   {self.S:>7}\n'
+            F'  - ins:   {self.I:>7}\n'
+            F'  - del:   {self.D:>7}\n'
+            '============================================================\n'
+        )
+        return summary
+
+
+class Utterance:
+    def __init__(self, uid, text):
+        self.uid = uid
+        self.text = text
+
+
+def LoadUtterances(filepath, format):
+    utts = {}
+    if format == 'text': # utt_id word1 word2 ...
+        with open(filepath, 'r', encoding='utf8') as f:
+            for line in f:
+                line = line.strip()
+                if line:
+                    cols = line.split(maxsplit=1)
+                    assert(len(cols) == 2 or len(cols) == 1)
+                    uid = cols[0]
+                    text = cols[1] if len(cols) == 2 else ''
+                    if utts.get(uid) != None:
+                        raise RuntimeError(F'Found duplicated utterence id {uid}')
+                    utts[uid] = Utterance(uid, text)
+    else:
+        raise RuntimeError(F'Unsupported text format {format}')
+    return utts
+
+
+def tokenize_text(text, tokenizer):
+    if tokenizer == 'whitespace':
+        return text.split()
+    elif tokenizer == 'char':
+        return [ ch for ch in ''.join(text.split()) ]
+    else:
+        raise RuntimeError(F'ERROR: Unsupported tokenizer {tokenizer}')
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    # optional
+    parser.add_argument('--tokenizer', choices=['whitespace', 'char'], default='whitespace', help='whitespace for WER, char for CER')
+    parser.add_argument('--ref-format', choices=['text'], default='text', help='reference format, first col is utt_id, the rest is text')
+    parser.add_argument('--hyp-format', choices=['text'], default='text', help='hypothesis format, first col is utt_id, the rest is text')
+    # required
+    parser.add_argument('--ref', type=str, required=True, help='input reference file')
+    parser.add_argument('--hyp', type=str, required=True, help='input hypothesis file')
+
+    parser.add_argument('result_file', type=str)
+    args = parser.parse_args()
+    logging.info(args)
+
+    ref_utts = LoadUtterances(args.ref, args.ref_format)
+    hyp_utts = LoadUtterances(args.hyp, args.hyp_format)
+
+    r = EvaluationResult()
+
+    # check valid utterances in hyp that have matched non-empty reference
+    eval_utts = []
+    r.num_hyp_without_ref = 0
+    for uid in sorted(hyp_utts.keys()):
+        if uid in ref_utts.keys(): # TODO: efficiency
+            if ref_utts[uid].text.strip(): # non-empty reference
+                eval_utts.append(uid)
+            else:
+                logging.warn(F'Found {uid} with empty reference, skipping...')
+        else:
+            logging.warn(F'Found {uid} without reference, skipping...')
+            r.num_hyp_without_ref += 1
+
+    r.num_hyp_utts = len(hyp_utts)
+    r.num_ref_utts = len(ref_utts)
+    r.num_eval_utts = len(eval_utts)
+
+    with open(args.result_file, 'w+', encoding='utf8') as fo:
+        for uid in eval_utts:
+            ref = ref_utts[uid]
+            hyp = hyp_utts[uid]
+
+            alignment, score = EditDistance(
+                tokenize_text(ref.text, args.tokenizer),
+                tokenize_text(hyp.text, args.tokenizer)
+            )
+            
+            c, s, i, d = CountEdits(alignment)
+            utt_ter = ComputeTokenErrorRate(c, s, i, d)
+
+            # utt-level evaluation result
+            print(F'{{"uid":{uid}, "score":{score}, "ter":{utt_ter:.2f}, "cor":{c}, "sub":{s}, "ins":{i}, "del":{d}}}', file=fo)
+            PrettyPrintAlignment(alignment, fo)
+
+            r.C += c
+            r.S += s
+            r.I += i
+            r.D += d
+
+            if utt_ter > 0:
+                r.num_utts_with_error += 1
+
+        # corpus level evaluation result
+        r.sentence_error_rate = ComputeSentenceErrorRate(r.num_utts_with_error, r.num_eval_utts)
+        r.token_error_rate = ComputeTokenErrorRate(r.C, r.S, r.I, r.D)
+
+        print(r.to_summary(), file=fo)
+
+    print(r.to_json())
+    print(r.to_kaldi())
diff --git a/egs/aishell2/transformer/utils/extract_embeds.py b/egs/aishell2/transformer/utils/extract_embeds.py
new file mode 100755
index 000000000..7b817d8ca
--- /dev/null
+++ b/egs/aishell2/transformer/utils/extract_embeds.py
@@ -0,0 +1,47 @@
+from transformers import AutoTokenizer, AutoModel, pipeline
+import numpy as np
+import sys
+import os
+import torch
+from kaldiio import WriteHelper
+import re
+text_file_json = sys.argv[1]
+out_ark = sys.argv[2]
+out_scp = sys.argv[3]
+out_shape = sys.argv[4]
+device = int(sys.argv[5])
+model_path = sys.argv[6]
+
+model = AutoModel.from_pretrained(model_path)
+tokenizer = AutoTokenizer.from_pretrained(model_path)
+extractor = pipeline(task="feature-extraction", model=model, tokenizer=tokenizer, device=device)
+
+with open(text_file_json, 'r') as f:
+    js = f.readlines()
+
+
+f_shape = open(out_shape, "w")
+with WriteHelper('ark,scp:{},{}'.format(out_ark, out_scp)) as writer:
+    with torch.no_grad():
+        for idx, line in enumerate(js):
+            id, tokens = line.strip().split(" ", 1)
+            tokens = re.sub(" ", "", tokens.strip())
+            tokens = ' '.join([j for j in tokens])
+            token_num = len(tokens.split(" "))
+            outputs = extractor(tokens)
+            outputs = np.array(outputs)
+            embeds = outputs[0, 1:-1, :]
+
+            token_num_embeds, dim = embeds.shape
+            if token_num == token_num_embeds:
+                writer(id, embeds)
+                shape_line = "{} {},{}\n".format(id, token_num_embeds, dim)
+                f_shape.write(shape_line)
+            else:
+                print("{}, size has changed, {}, {}, {}".format(id, token_num, token_num_embeds, tokens))
+
+
+
+f_shape.close()
+
+
diff --git a/egs/aishell2/transformer/utils/filter_scp.pl b/egs/aishell2/transformer/utils/filter_scp.pl
new file mode 100755
index 000000000..003530d53
--- /dev/null
+++ b/egs/aishell2/transformer/utils/filter_scp.pl
@@ -0,0 +1,87 @@
+#!/usr/bin/env perl
+# Copyright 2010-2012 Microsoft Corporation
+#                     Johns Hopkins University (author: Daniel Povey)
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+# MERCHANTABLITY OR NON-INFRINGEMENT.
+# See the Apache 2 License for the specific language governing permissions and
+# limitations under the License.
+
+
+# This script takes a list of utterance-ids or any file whose first field
+# of each line is an utterance-id, and filters an scp
+# file (or any file whose "n-th" field is an utterance id), printing
+# out only those lines whose "n-th" field is in id_list. The index of
+# the "n-th" field is 1, by default, but can be changed by using
+# the -f <n> switch
+
+$exclude = 0;
+$field = 1;
+$shifted = 0;
+
+do {
+  $shifted=0;
+  if ($ARGV[0] eq "--exclude") {
+    $exclude = 1;
+    shift @ARGV;
+    $shifted=1;
+  }
+  if ($ARGV[0] eq "-f") {
+    $field = $ARGV[1];
+    shift @ARGV; shift @ARGV;
+    $shifted=1
+  }
+} while ($shifted);
+
+if(@ARGV < 1 || @ARGV > 2) {
+  die "Usage: filter_scp.pl [--exclude] [-f <field-to-filter-on>] id_list [in.scp] > out.scp \n" .
+      "Prints only the input lines whose f'th field (default: first) is in 'id_list'.\n" .
+      "Note: only the first field of each line in id_list matters.  With --exclude, prints\n" .
+      "only the lines that were *not* in id_list.\n" .
+      "Caution: previously, the -f option was interpreted as a zero-based field index.\n" .
+      "If your older scripts (written before Oct 2014) stopped working and you used the\n" .
+      "-f option, add 1 to the argument.\n" .
+      "See also: scripts/filter_scp.pl .\n";
+}
+
+
+$idlist = shift @ARGV;
+open(F, "<$idlist") || die "Could not open id-list file $idlist";
+while(<F>) {
+  @A = split;
+  @A>=1 || die "Invalid id-list file line $_";
+  $seen{$A[0]} = 1;
+}
+
+if ($field == 1) { # Treat this as special case, since it is common.
+  while(<>) {
+    $_ =~ m/\s*(\S+)\s*/ || die "Bad line $_, could not get first field.";
+    # $1 is what we filter on.
+    if ((!$exclude && $seen{$1}) || ($exclude && !defined $seen{$1})) {
+      print $_;
+    }
+  }
+} else {
+  while(<>) {
+    @A = split;
+    @A > 0 || die "Invalid scp file line $_";
+    @A >= $field || die "Invalid scp file line $_";
+    if ((!$exclude && $seen{$A[$field-1]}) || ($exclude && !defined $seen{$A[$field-1]})) {
+      print $_;
+    }
+  }
+}
+
+# tests:
+# the following should print "foo 1"
+# ( echo foo 1; echo bar 2 ) | scripts/filter_scp.pl <(echo foo)
+# the following should print "bar 2".
+# ( echo foo 1; echo bar 2 ) | scripts/filter_scp.pl -f 2 <(echo 2)
diff --git a/egs/aishell2/transformer/utils/fix_data.sh b/egs/aishell2/transformer/utils/fix_data.sh
new file mode 100755
index 000000000..b1a2bb808
--- /dev/null
+++ b/egs/aishell2/transformer/utils/fix_data.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+echo "$0 $@"
+data_dir=$1
+
+if [ ! -f ${data_dir}/wav.scp ]; then
+  echo "$0: wav.scp is not found"
+  exit 1;
+fi
+
+if [ ! -f ${data_dir}/text ]; then
+  echo "$0: text is not found"
+  exit 1;
+fi
+
+
+
+mkdir -p ${data_dir}/.backup
+
+awk '{print $1}' ${data_dir}/wav.scp > ${data_dir}/.backup/wav_id
+awk '{print $1}' ${data_dir}/text > ${data_dir}/.backup/text_id
+
+sort ${data_dir}/.backup/wav_id ${data_dir}/.backup/text_id | uniq -d > ${data_dir}/.backup/id
+
+cp ${data_dir}/wav.scp ${data_dir}/.backup/wav.scp
+cp ${data_dir}/text ${data_dir}/.backup/text
+
+mv ${data_dir}/wav.scp ${data_dir}/wav.scp.bak
+mv ${data_dir}/text ${data_dir}/text.bak
+
+utils/filter_scp.pl -f 1 ${data_dir}/.backup/id ${data_dir}/wav.scp.bak | sort -k1,1 -u > ${data_dir}/wav.scp
+utils/filter_scp.pl -f 1 ${data_dir}/.backup/id ${data_dir}/text.bak | sort -k1,1 -u > ${data_dir}/text
+
+rm ${data_dir}/wav.scp.bak
+rm ${data_dir}/text.bak
diff --git a/egs/aishell2/transformer/utils/fix_data_feat.sh b/egs/aishell2/transformer/utils/fix_data_feat.sh
new file mode 100755
index 000000000..84eea36b6
--- /dev/null
+++ b/egs/aishell2/transformer/utils/fix_data_feat.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+echo "$0 $@"
+data_dir=$1
+
+if [ ! -f ${data_dir}/feats.scp ]; then
+  echo "$0: feats.scp is not found"
+  exit 1;
+fi
+
+if [ ! -f ${data_dir}/text ]; then
+  echo "$0: text is not found"
+  exit 1;
+fi
+
+if [ ! -f ${data_dir}/speech_shape ]; then
+  echo "$0: feature lengths is not found"
+  exit 1;
+fi
+
+if [ ! -f ${data_dir}/text_shape ]; then
+  echo "$0: text lengths is not found"
+  exit 1;
+fi
+
+mkdir -p ${data_dir}/.backup
+
+awk '{print $1}' ${data_dir}/feats.scp > ${data_dir}/.backup/wav_id
+awk '{print $1}' ${data_dir}/text > ${data_dir}/.backup/text_id
+
+sort ${data_dir}/.backup/wav_id ${data_dir}/.backup/text_id | uniq -d > ${data_dir}/.backup/id
+
+cp ${data_dir}/feats.scp ${data_dir}/.backup/feats.scp
+cp ${data_dir}/text ${data_dir}/.backup/text
+cp ${data_dir}/speech_shape ${data_dir}/.backup/speech_shape
+cp ${data_dir}/text_shape ${data_dir}/.backup/text_shape
+
+mv ${data_dir}/feats.scp ${data_dir}/feats.scp.bak
+mv ${data_dir}/text ${data_dir}/text.bak
+mv ${data_dir}/speech_shape ${data_dir}/speech_shape.bak
+mv ${data_dir}/text_shape ${data_dir}/text_shape.bak
+
+utils/filter_scp.pl -f 1 ${data_dir}/.backup/id ${data_dir}/feats.scp.bak | sort -k1,1 -u > ${data_dir}/feats.scp
+utils/filter_scp.pl -f 1 ${data_dir}/.backup/id ${data_dir}/text.bak | sort -k1,1 -u > ${data_dir}/text
+utils/filter_scp.pl -f 1 ${data_dir}/.backup/id ${data_dir}/speech_shape.bak | sort -k1,1 -u > ${data_dir}/speech_shape
+utils/filter_scp.pl -f 1 ${data_dir}/.backup/id ${data_dir}/text_shape.bak | sort -k1,1 -u > ${data_dir}/text_shape
+
+rm ${data_dir}/feats.scp.bak
+rm ${data_dir}/text.bak
+rm ${data_dir}/speech_shape.bak
+rm ${data_dir}/text_shape.bak
+
diff --git a/egs/aishell2/transformer/utils/gen_ark_list.sh b/egs/aishell2/transformer/utils/gen_ark_list.sh
new file mode 100755
index 000000000..aebf3562d
--- /dev/null
+++ b/egs/aishell2/transformer/utils/gen_ark_list.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+
+# Begin configuration section.
+nj=32
+cmd=./utils/run.pl
+
+echo "$0 $@"
+
+. utils/parse_options.sh || exit 1;
+
+ark_dir=$1
+txt_dir=$2
+output_dir=$3
+
+[ ! -d ${ark_dir}/ark ] && echo "$0: ark data is required" && exit 1;
+[ ! -d ${txt_dir}/txt ] && echo "$0: txt data is required" && exit 1;
+
+for n in $(seq $nj); do
+  echo "${ark_dir}/ark/feats.$n.ark ${txt_dir}/txt/text.$n.txt" || exit 1
+done > ${output_dir}/ark_txt.scp || exit 1
+
diff --git a/egs/aishell2/transformer/utils/parse_options.sh b/egs/aishell2/transformer/utils/parse_options.sh
new file mode 100755
index 000000000..71fb9e5ea
--- /dev/null
+++ b/egs/aishell2/transformer/utils/parse_options.sh
@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+
+# Copyright 2012  Johns Hopkins University (Author: Daniel Povey);
+#                 Arnab Ghoshal, Karel Vesely
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+# MERCHANTABLITY OR NON-INFRINGEMENT.
+# See the Apache 2 License for the specific language governing permissions and
+# limitations under the License.
+
+
+# Parse command-line options.
+# To be sourced by another script (as in ". parse_options.sh").
+# Option format is: --option-name arg
+# and shell variable "option_name" gets set to value "arg."
+# The exception is --help, which takes no arguments, but prints the
+# $help_message variable (if defined).
+
+
+###
+### The --config file options have lower priority to command line
+### options, so we need to import them first...
+###
+
+# Now import all the configs specified by command-line, in left-to-right order
+for ((argpos=1; argpos<$#; argpos++)); do
+  if [ "${!argpos}" == "--config" ]; then
+    argpos_plus1=$((argpos+1))
+    config=${!argpos_plus1}
+    [ ! -r $config ] && echo "$0: missing config '$config'" && exit 1
+    . $config  # source the config file.
+  fi
+done
+
+
+###
+### Now we process the command line options
+###
+while true; do
+  [ -z "${1:-}" ] && break;  # break if there are no arguments
+  case "$1" in
+    # If the enclosing script is called with --help option, print the help
+    # message and exit.  Scripts should put help messages in $help_message
+    --help|-h) if [ -z "$help_message" ]; then echo "No help found." 1>&2;
+      else printf "$help_message\n" 1>&2 ; fi;
+      exit 0 ;;
+    --*=*) echo "$0: options to scripts must be of the form --name value, got '$1'"
+      exit 1 ;;
+    # If the first command-line argument begins with "--" (e.g. --foo-bar),
+    # then work out the variable name as $name, which will equal "foo_bar".
+    --*) name=`echo "$1" | sed s/^--// | sed s/-/_/g`;
+      # Next we test whether the variable in question is undefned-- if so it's
+      # an invalid option and we die.  Note: $0 evaluates to the name of the
+      # enclosing script.
+      # The test [ -z ${foo_bar+xxx} ] will return true if the variable foo_bar
+      # is undefined.  We then have to wrap this test inside "eval" because
+      # foo_bar is itself inside a variable ($name).
+      eval '[ -z "${'$name'+xxx}" ]' && echo "$0: invalid option $1" 1>&2 && exit 1;
+
+      oldval="`eval echo \\$$name`";
+      # Work out whether we seem to be expecting a Boolean argument.
+      if [ "$oldval" == "true" ] || [ "$oldval" == "false" ]; then
+        was_bool=true;
+      else
+        was_bool=false;
+      fi
+
+      # Set the variable to the right value-- the escaped quotes make it work if
+      # the option had spaces, like --cmd "queue.pl -sync y"
+      eval $name=\"$2\";
+
+      # Check that Boolean-valued arguments are really Boolean.
+      if $was_bool && [[ "$2" != "true" && "$2" != "false" ]]; then
+        echo "$0: expected \"true\" or \"false\": $1 $2" 1>&2
+        exit 1;
+      fi
+      shift 2;
+      ;;
+  *) break;
+  esac
+done
+
+
+# Check for an empty argument to the --cmd option, which can easily occur as a
+# result of scripting errors.
+[ ! -z "${cmd+xxx}" ] && [ -z "$cmd" ] && echo "$0: empty argument to --cmd option" 1>&2 && exit 1;
+
+
+true; # so this script returns exit code 0.
diff --git a/egs/aishell2/transformer/utils/print_args.py b/egs/aishell2/transformer/utils/print_args.py
new file mode 100755
index 000000000..b0c61e5b4
--- /dev/null
+++ b/egs/aishell2/transformer/utils/print_args.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+import sys
+
+
+def get_commandline_args(no_executable=True):
+    extra_chars = [
+        " ",
+        ";",
+        "&",
+        "|",
+        "<",
+        ">",
+        "?",
+        "*",
+        "~",
+        "`",
+        '"',
+        "'",
+        "\\",
+        "{",
+        "}",
+        "(",
+        ")",
+    ]
+
+    # Escape the extra characters for shell
+    argv = [
+        arg.replace("'", "'\\''")
+        if all(char not in arg for char in extra_chars)
+        else "'" + arg.replace("'", "'\\''") + "'"
+        for arg in sys.argv
+    ]
+
+    if no_executable:
+        return " ".join(argv[1:])
+    else:
+        return sys.executable + " " + " ".join(argv)
+
+
+def main():
+    print(get_commandline_args())
+
+
+if __name__ == "__main__":
+    main()
diff --git a/egs/aishell2/transformer/utils/proc_conf_oss.py b/egs/aishell2/transformer/utils/proc_conf_oss.py
new file mode 100755
index 000000000..c4a90c5c1
--- /dev/null
+++ b/egs/aishell2/transformer/utils/proc_conf_oss.py
@@ -0,0 +1,35 @@
+from pathlib import Path
+
+import torch
+import yaml
+
+
+class NoAliasSafeDumper(yaml.SafeDumper):
+    # Disable anchor/alias in yaml because looks ugly
+    def ignore_aliases(self, data):
+        return True
+
+
+def yaml_no_alias_safe_dump(data, stream=None, **kwargs):
+    """Safe-dump in yaml with no anchor/alias"""
+    return yaml.dump(
+        data, stream, allow_unicode=True, Dumper=NoAliasSafeDumper, **kwargs
+    )
+
+
+def gen_conf(file, out_dir):
+    conf = torch.load(file)["config"]
+    conf["oss_bucket"] = "null"
+    print(conf)
+    output_dir = Path(out_dir)
+    output_dir.mkdir(parents=True, exist_ok=True)
+    with (output_dir / "config.yaml").open("w", encoding="utf-8") as f:
+        yaml_no_alias_safe_dump(conf, f, indent=4, sort_keys=False)
+
+
+if __name__ == "__main__":
+    import sys
+
+    in_f = sys.argv[1]
+    out_f = sys.argv[2]
+    gen_conf(in_f, out_f)
diff --git a/egs/aishell2/transformer/utils/proce_text.py b/egs/aishell2/transformer/utils/proce_text.py
new file mode 100755
index 000000000..9e517a4e1
--- /dev/null
+++ b/egs/aishell2/transformer/utils/proce_text.py
@@ -0,0 +1,31 @@
+
+import sys
+import re
+
+in_f = sys.argv[1]
+out_f = sys.argv[2]
+
+
+with open(in_f, "r", encoding="utf-8") as f:
+  lines = f.readlines()
+
+with open(out_f, "w", encoding="utf-8") as f:
+  for line in lines:
+    outs = line.strip().split(" ", 1)
+    if len(outs) == 2:
+      idx, text = outs
+      text = re.sub("</s>", "", text)
+      text = re.sub("<s>", "", text)
+      text = re.sub("@@", "", text)
+      text = re.sub("@", "", text)
+      text = re.sub("<unk>", "", text)
+      text = re.sub(" ", "", text)
+      text = text.lower()
+    else:
+      idx = outs[0]
+      text = " "
+
+    text = [x for x in text]
+    text = " ".join(text)
+    out = "{} {}\n".format(idx, text)
+    f.write(out)
diff --git a/egs/aishell2/transformer/utils/run.pl b/egs/aishell2/transformer/utils/run.pl
new file mode 100755
index 000000000..483f95bc6
--- /dev/null
+++ b/egs/aishell2/transformer/utils/run.pl
@@ -0,0 +1,356 @@
+#!/usr/bin/env perl
+use warnings; #sed replacement for -w perl parameter
+# In general, doing
+#  run.pl some.log a b c is like running the command a b c in
+# the bash shell, and putting the standard error and output into some.log.
+# To run parallel jobs (backgrounded on the host machine), you can do (e.g.)
+#  run.pl JOB=1:4 some.JOB.log a b c JOB is like running the command a b c JOB
+# and putting it in some.JOB.log, for each one. [Note: JOB can be any identifier].
+# If any of the jobs fails, this script will fail.
+
+# A typical example is:
+#  run.pl some.log my-prog "--opt=foo bar" foo \|  other-prog baz
+# and run.pl will run something like:
+# ( my-prog '--opt=foo bar' foo |  other-prog baz ) >& some.log
+#
+# Basically it takes the command-line arguments, quotes them
+# as necessary to preserve spaces, and evaluates them with bash.
+# In addition it puts the command line at the top of the log, and
+# the start and end times of the command at the beginning and end.
+# The reason why this is useful is so that we can create a different
+# version of this program that uses a queueing system instead.
+
+#use Data::Dumper;
+
+@ARGV < 2 && die "usage: run.pl log-file command-line arguments...";
+
+#print STDERR "COMMAND-LINE: " .  Dumper(\@ARGV) . "\n";
+$job_pick = 'all';
+$max_jobs_run = -1;
+$jobstart = 1;
+$jobend = 1;
+$ignored_opts = ""; # These will be ignored.
+
+# First parse an option like JOB=1:4, and any
+# options that would normally be given to
+# queue.pl, which we will just discard.
+
+for (my $x = 1; $x <= 2; $x++) { # This for-loop is to
+  # allow the JOB=1:n option to be interleaved with the
+  # options to qsub.
+  while (@ARGV >= 2 && $ARGV[0] =~ m:^-:) {
+    # parse any options that would normally go to qsub, but which will be ignored here.
+    my $switch = shift @ARGV;
+    if ($switch eq "-V") {
+      $ignored_opts .= "-V ";
+    } elsif ($switch eq "--max-jobs-run" || $switch eq "-tc") {
+      # we do support the option --max-jobs-run n, and its GridEngine form -tc n.
+      # if the command appears multiple times uses the smallest option.
+      if ( $max_jobs_run <= 0 ) {
+          $max_jobs_run =  shift @ARGV;
+      } else {
+        my $new_constraint = shift @ARGV;
+        if ( ($new_constraint < $max_jobs_run) ) {
+          $max_jobs_run = $new_constraint;
+        }
+      }
+      
+      if (! ($max_jobs_run > 0)) {
+        die "run.pl: invalid option --max-jobs-run $max_jobs_run";
+      }
+    } else {
+      my $argument = shift @ARGV;
+      if ($argument =~ m/^--/) {
+        print STDERR "run.pl: WARNING: suspicious argument '$argument' to $switch; starts with '-'\n";
+      }
+      if ($switch eq "-sync" && $argument =~ m/^[yY]/) {
+        $ignored_opts .= "-sync "; # Note: in the
+        # corresponding code in queue.pl it says instead, just "$sync = 1;".
+      } elsif ($switch eq "-pe") { # e.g. -pe smp 5
+        my $argument2 = shift @ARGV;
+        $ignored_opts .= "$switch $argument $argument2 ";
+      } elsif ($switch eq "--gpu") {
+        $using_gpu = $argument;
+      } elsif ($switch eq "--pick") {
+        if($argument =~ m/^(all|failed|incomplete)$/) {
+          $job_pick = $argument;
+        } else {
+          print STDERR "run.pl: ERROR: --pick argument must be one of 'all', 'failed' or 'incomplete'"
+        }
+      } else {
+        # Ignore option.
+        $ignored_opts .= "$switch $argument ";
+      }
+    }
+  }
+  if ($ARGV[0] =~ m/^([\w_][\w\d_]*)+=(\d+):(\d+)$/) { # e.g. JOB=1:20
+    $jobname = $1;
+    $jobstart = $2;
+    $jobend = $3;
+    if ($jobstart > $jobend) {
+      die "run.pl: invalid job range $ARGV[0]";
+    }
+    if ($jobstart <= 0) {
+      die "run.pl: invalid job range $ARGV[0], start must be strictly positive (this is required for GridEngine compatibility).";
+    }
+    shift;
+  } elsif ($ARGV[0] =~ m/^([\w_][\w\d_]*)+=(\d+)$/) { # e.g. JOB=1.
+    $jobname = $1;
+    $jobstart = $2;
+    $jobend = $2;
+    shift;
+  } elsif ($ARGV[0] =~ m/.+\=.*\:.*$/) {
+    print STDERR "run.pl: Warning: suspicious first argument to run.pl: $ARGV[0]\n";
+  }
+}
+
+# Users found this message confusing so we are removing it.
+# if ($ignored_opts ne "") {
+#   print STDERR "run.pl: Warning: ignoring options \"$ignored_opts\"\n";
+# }
+
+if ($max_jobs_run == -1) { # If --max-jobs-run option not set,
+                           # then work out the number of processors if possible,
+                           # and set it based on that.
+  $max_jobs_run = 0;
+  if ($using_gpu) {
+    if (open(P, "nvidia-smi -L |")) {
+      $max_jobs_run++ while (<P>);
+      close(P);
+    }
+    if ($max_jobs_run == 0) {
+      $max_jobs_run = 1;
+      print STDERR "run.pl: Warning: failed to detect number of GPUs from nvidia-smi, using ${max_jobs_run}\n";
+    }
+  } elsif (open(P, "</proc/cpuinfo")) {  # Linux
+    while (<P>) { if (m/^processor/) { $max_jobs_run++; } }
+    if ($max_jobs_run == 0) {
+      print STDERR "run.pl: Warning: failed to detect any processors from /proc/cpuinfo\n";
+      $max_jobs_run = 10;  # reasonable default.
+    }
+    close(P);
+  } elsif (open(P, "sysctl -a |")) {  # BSD/Darwin
+    while (<P>) {
+      if (m/hw\.ncpu\s*[:=]\s*(\d+)/) { # hw.ncpu = 4, or hw.ncpu: 4
+        $max_jobs_run = $1;
+        last;
+      }
+    }
+    close(P);
+    if ($max_jobs_run == 0) {
+      print STDERR "run.pl: Warning: failed to detect any processors from sysctl -a\n";
+      $max_jobs_run = 10;  # reasonable default.
+    }
+  } else {
+    # allow at most 32 jobs at once, on non-UNIX systems; change this code
+    # if you need to change this default.
+    $max_jobs_run = 32;
+  }
+  # The just-computed value of $max_jobs_run is just the number of processors
+  # (or our best guess); and if it happens that the number of jobs we need to
+  # run is just slightly above $max_jobs_run, it will make sense to increase
+  # $max_jobs_run to equal the number of jobs, so we don't have a small number
+  # of leftover jobs.
+  $num_jobs = $jobend - $jobstart + 1;
+  if (!$using_gpu &&
+      $num_jobs > $max_jobs_run && $num_jobs < 1.4 * $max_jobs_run) {
+    $max_jobs_run = $num_jobs;
+  }
+}
+
+sub pick_or_exit {
+  # pick_or_exit ( $logfile ) 
+  # Invoked before each job is started helps to run jobs selectively.
+  #
+  # Given the name of the output logfile decides whether the job must be 
+  # executed (by returning from the subroutine) or not (by terminating the
+  # process calling exit)
+  # 
+  # PRE: $job_pick is a global variable set by command line switch --pick
+  #      and indicates which class of jobs must be executed.
+  #
+  # 1) If a failed job is not executed the process exit code will indicate 
+  #    failure, just as if the task was just executed  and failed.
+  #
+  # 2) If a task is incomplete it will be executed. Incomplete may be either
+  #    a job whose log file does not contain the accounting notes in the end,
+  #    or a job whose log file does not exist.
+  #
+  # 3) If the $job_pick is set to 'all' (default behavior) a task will be
+  #    executed regardless of the result of previous attempts.
+  #
+  # This logic could have been implemented in the main execution loop
+  # but a subroutine to preserve the current level of readability of
+  # that part of the code.
+  #
+  # Alexandre Felipe, (o.alexandre.felipe@gmail.com) 14th of August of 2020
+  #
+  if($job_pick eq 'all'){
+    return; # no need to bother with the previous log
+  }
+  open my $fh, "<", $_[0] or return; # job not executed yet
+  my $log_line;
+  my $cur_line;
+  while ($cur_line = <$fh>) {
+    if( $cur_line =~ m/# Ended \(code .*/ ) {
+      $log_line = $cur_line;
+    }
+  }
+  close $fh;
+  if (! defined($log_line)){
+    return; # incomplete
+  }
+  if ( $log_line =~ m/# Ended \(code 0\).*/ ) {
+    exit(0); # complete
+  } elsif ( $log_line =~ m/# Ended \(code \d+(; signal \d+)?\).*/ ){
+    if ($job_pick !~ m/^(failed|all)$/) {
+      exit(1); # failed but not going to run
+    } else {
+      return; # failed
+    }
+  } elsif ( $log_line =~ m/.*\S.*/ ) {
+    return; # incomplete jobs are always run
+  }
+}
+
+
+$logfile = shift @ARGV;
+
+if (defined $jobname && $logfile !~ m/$jobname/ &&
+    $jobend > $jobstart) {
+  print STDERR "run.pl: you are trying to run a parallel job but "
+    . "you are putting the output into just one log file ($logfile)\n";
+  exit(1);
+}
+
+$cmd = "";
+
+foreach $x (@ARGV) {
+    if ($x =~ m/^\S+$/) { $cmd .=  $x . " "; }
+    elsif ($x =~ m:\":) { $cmd .= "'$x' "; }
+    else { $cmd .= "\"$x\" "; }
+}
+
+#$Data::Dumper::Indent=0;
+$ret = 0;
+$numfail = 0;
+%active_pids=();
+
+use POSIX ":sys_wait_h";
+for ($jobid = $jobstart; $jobid <= $jobend; $jobid++) {
+  if (scalar(keys %active_pids) >= $max_jobs_run) {
+
+    # Lets wait for a change in any child's status
+    # Then we have to work out which child finished
+    $r = waitpid(-1, 0);
+    $code = $?;
+    if ($r < 0 ) { die "run.pl: Error waiting for child process"; } # should never happen.
+    if ( defined $active_pids{$r} ) {
+        $jid=$active_pids{$r};
+        $fail[$jid]=$code;
+        if ($code !=0) { $numfail++;}
+        delete $active_pids{$r};
+        # print STDERR "Finished: $r/$jid " .  Dumper(\%active_pids) . "\n";
+    } else {
+        die "run.pl: Cannot find the PID of the child process that just finished.";
+    }
+
+    # In theory we could do a non-blocking waitpid over all jobs running just
+    # to find out if only one or more jobs finished during the previous waitpid()
+    # However, we just omit this and will reap the next one in the next pass
+    # through the for(;;) cycle
+  }
+  $childpid = fork();
+  if (!defined $childpid) { die "run.pl: Error forking in run.pl (writing to $logfile)"; }
+  if ($childpid == 0) { # We're in the child... this branch
+    # executes the job and returns (possibly with an error status).
+    if (defined $jobname) {
+      $cmd =~ s/$jobname/$jobid/g;
+      $logfile =~ s/$jobname/$jobid/g;
+    }
+    # exit if the job does not need to be executed
+    pick_or_exit( $logfile );
+
+    system("mkdir -p `dirname $logfile` 2>/dev/null");
+    open(F, ">$logfile") || die "run.pl: Error opening log file $logfile";
+    print F "# " . $cmd . "\n";
+    print F "# Started at " . `date`;
+    $starttime = `date +'%s'`;
+    print F "#\n";
+    close(F);
+
+    # Pipe into bash.. make sure we're not using any other shell.
+    open(B, "|bash") || die "run.pl: Error opening shell command";
+    print B "( " . $cmd . ") 2>>$logfile >> $logfile";
+    close(B);                   # If there was an error, exit status is in $?
+    $ret = $?;
+
+    $lowbits = $ret & 127;
+    $highbits = $ret >> 8;
+    if ($lowbits != 0) { $return_str = "code $highbits; signal $lowbits" }
+    else { $return_str = "code $highbits"; }
+
+    $endtime = `date +'%s'`;
+    open(F, ">>$logfile") || die "run.pl: Error opening log file $logfile (again)";
+    $enddate = `date`;
+    chop $enddate;
+    print F "# Accounting: time=" . ($endtime - $starttime) . " threads=1\n";
+    print F "# Ended ($return_str) at " . $enddate . ", elapsed time " . ($endtime-$starttime) . " seconds\n";
+    close(F);
+    exit($ret == 0 ? 0 : 1);
+  } else {
+    $pid[$jobid] = $childpid;
+    $active_pids{$childpid} = $jobid;
+    # print STDERR "Queued: " .  Dumper(\%active_pids) . "\n";
+  }
+}
+
+# Now we have submitted all the jobs, lets wait until all the jobs finish
+foreach $child (keys %active_pids) {
+    $jobid=$active_pids{$child};
+    $r = waitpid($pid[$jobid], 0);
+    $code = $?;
+    if ($r == -1) { die "run.pl: Error waiting for child process"; } # should never happen.
+    if ($r != 0) { $fail[$jobid]=$code; $numfail++ if $code!=0; } # Completed successfully
+}
+
+# Some sanity checks:
+# The $fail array should not contain undefined codes
+# The number of non-zeros in that array  should be equal to $numfail
+# We cannot do foreach() here, as the JOB ids do not start at zero
+$failed_jids=0;
+for ($jobid = $jobstart; $jobid <= $jobend; $jobid++) {
+  $job_return = $fail[$jobid];
+  if (not defined $job_return ) {
+    # print Dumper(\@fail);
+
+    die "run.pl: Sanity check failed: we have indication that some jobs are running " .
+      "even after we waited for all jobs to finish" ;
+  }
+  if ($job_return != 0 ){ $failed_jids++;}
+}
+if ($failed_jids != $numfail) {
+  die "run.pl: Sanity check failed: cannot find out how many jobs failed ($failed_jids x $numfail)."
+}
+if ($numfail > 0) { $ret = 1; }
+
+if ($ret != 0) {
+  $njobs = $jobend - $jobstart + 1;
+  if ($njobs == 1) {
+    if (defined $jobname) {
+      $logfile =~ s/$jobname/$jobstart/; # only one numbered job, so replace name with
+                                         # that job.
+    }
+    print STDERR "run.pl: job failed, log is in $logfile\n";
+    if ($logfile =~ m/JOB/) {
+      print STDERR "run.pl: probably you forgot to put JOB=1:\$nj in your script.";
+    }
+  }
+  else {
+    $logfile =~ s/$jobname/*/g;
+    print STDERR "run.pl: $numfail / $njobs failed, log is in $logfile\n";
+  }
+}
+
+
+exit ($ret);
diff --git a/egs/aishell2/transformer/utils/shuffle_list.pl b/egs/aishell2/transformer/utils/shuffle_list.pl
new file mode 100755
index 000000000..a116200f4
--- /dev/null
+++ b/egs/aishell2/transformer/utils/shuffle_list.pl
@@ -0,0 +1,44 @@
+#!/usr/bin/env perl
+
+# Copyright 2013  Johns Hopkins University (author: Daniel Povey)
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+# MERCHANTABLITY OR NON-INFRINGEMENT.
+# See the Apache 2 License for the specific language governing permissions and
+# limitations under the License.
+
+
+if ($ARGV[0] eq "--srand") {
+  $n = $ARGV[1];
+  $n =~ m/\d+/ || die "Bad argument to --srand option: \"$n\"";
+  srand($ARGV[1]);
+  shift;
+  shift;
+} else {
+  srand(0); # Gives inconsistent behavior if we don't seed.
+}
+
+if (@ARGV > 1 || $ARGV[0] =~ m/^-.+/) { # >1 args, or an option we
+  # don't understand.
+  print "Usage: shuffle_list.pl [--srand N] [input file]  > output\n";
+  print "randomizes the order of lines of input.\n";
+  exit(1);
+}
+
+@lines;
+while (<>) {
+  push @lines, [ (rand(), $_)] ;
+}
+
+@lines = sort { $a->[0] cmp $b->[0] } @lines;
+foreach $l (@lines) {
+    print $l->[1];
+}
\ No newline at end of file
diff --git a/egs/aishell2/transformer/utils/split_data.py b/egs/aishell2/transformer/utils/split_data.py
new file mode 100755
index 000000000..060eae6d3
--- /dev/null
+++ b/egs/aishell2/transformer/utils/split_data.py
@@ -0,0 +1,60 @@
+import os
+import sys
+import random
+
+
+in_dir = sys.argv[1]
+out_dir = sys.argv[2]
+num_split = sys.argv[3]
+
+
+def split_scp(scp, num):
+    assert len(scp) >= num
+    avg = len(scp) // num
+    out = []
+    begin = 0
+
+    for i in range(num):
+        if i == num - 1:
+            out.append(scp[begin:])
+        else:
+            out.append(scp[begin:begin+avg])
+        begin += avg
+
+    return out
+
+
+os.path.exists("{}/wav.scp".format(in_dir))
+os.path.exists("{}/text".format(in_dir))
+
+with open("{}/wav.scp".format(in_dir), 'r') as infile:
+    wav_list = infile.readlines()
+
+with open("{}/text".format(in_dir), 'r') as infile:
+    text_list = infile.readlines()
+
+assert len(wav_list) == len(text_list)
+
+x = list(zip(wav_list, text_list))
+random.shuffle(x)
+wav_shuffle_list, text_shuffle_list = zip(*x)
+
+num_split = int(num_split)
+wav_split_list = split_scp(wav_shuffle_list, num_split)
+text_split_list = split_scp(text_shuffle_list, num_split)
+
+for idx, wav_list in enumerate(wav_split_list, 1):
+    path = out_dir + "/split" + str(num_split) + "/" + str(idx)
+    if not os.path.exists(path):
+        os.makedirs(path)
+    with open("{}/wav.scp".format(path), 'w') as wav_writer:
+        for line in wav_list:
+            wav_writer.write(line)
+
+for idx, text_list in enumerate(text_split_list, 1):
+    path = out_dir + "/split" + str(num_split) + "/" + str(idx)
+    if not os.path.exists(path):
+        os.makedirs(path)
+    with open("{}/text".format(path), 'w') as text_writer:
+        for line in text_list:
+            text_writer.write(line)
diff --git a/egs/aishell2/transformer/utils/split_scp.pl b/egs/aishell2/transformer/utils/split_scp.pl
new file mode 100755
index 000000000..0876dcb6d
--- /dev/null
+++ b/egs/aishell2/transformer/utils/split_scp.pl
@@ -0,0 +1,246 @@
+#!/usr/bin/env perl
+
+# Copyright 2010-2011 Microsoft Corporation
+
+# See ../../COPYING for clarification regarding multiple authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+# WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+# MERCHANTABLITY OR NON-INFRINGEMENT.
+# See the Apache 2 License for the specific language governing permissions and
+# limitations under the License.
+
+
+# This program splits up any kind of .scp or archive-type file.
+# If there is no utt2spk option it will work on any text  file and
+# will split it up with an approximately equal number of lines in
+# each but.
+# With the --utt2spk option it will work on anything that has the
+# utterance-id as the first entry on each line; the utt2spk file is
+# of the form "utterance speaker" (on each line).
+# It splits it into equal size chunks as far as it can.  If you use the utt2spk
+# option it will make sure these chunks coincide with speaker boundaries.  In
+# this case, if there are more chunks than speakers (and in some other
+# circumstances), some of the resulting chunks will be empty and it will print
+# an error message and exit with nonzero status.
+# You will normally call this like:
+# split_scp.pl scp scp.1 scp.2 scp.3 ...
+# or
+# split_scp.pl --utt2spk=utt2spk scp scp.1 scp.2 scp.3 ...
+# Note that you can use this script to split the utt2spk file itself,
+# e.g. split_scp.pl --utt2spk=utt2spk utt2spk utt2spk.1 utt2spk.2 ...
+
+# You can also call the scripts like:
+# split_scp.pl -j 3 0 scp scp.0
+# [note: with this option, it assumes zero-based indexing of the split parts,
+# i.e. the second number must be 0 <= n < num-jobs.]
+
+use warnings;
+
+$num_jobs = 0;
+$job_id = 0;
+$utt2spk_file = "";
+$one_based = 0;
+
+for ($x = 1; $x <= 3 && @ARGV > 0; $x++) {
+    if ($ARGV[0] eq "-j") {
+        shift @ARGV;
+        $num_jobs = shift @ARGV;
+        $job_id = shift @ARGV;
+    }
+    if ($ARGV[0] =~ /--utt2spk=(.+)/) {
+        $utt2spk_file=$1;
+        shift;
+    }
+    if ($ARGV[0] eq '--one-based') {
+        $one_based = 1;
+        shift @ARGV;
+    }
+}
+
+if ($num_jobs != 0 && ($num_jobs < 0 || $job_id - $one_based < 0 ||
+                       $job_id - $one_based >= $num_jobs)) {
+  die "$0: Invalid job number/index values for '-j $num_jobs $job_id" .
+      ($one_based ? " --one-based" : "") . "'\n"
+}
+
+$one_based
+    and $job_id--;
+
+if(($num_jobs == 0 && @ARGV < 2) || ($num_jobs > 0 && (@ARGV < 1 || @ARGV > 2))) {
+    die
+"Usage: split_scp.pl [--utt2spk=<utt2spk_file>] in.scp out1.scp out2.scp ...
+   or: split_scp.pl -j num-jobs job-id [--one-based] [--utt2spk=<utt2spk_file>] in.scp [out.scp]
+ ... where 0 <= job-id < num-jobs, or 1 <= job-id <- num-jobs if --one-based.\n";
+}
+
+$error = 0;
+$inscp = shift @ARGV;
+if ($num_jobs == 0) { # without -j option
+    @OUTPUTS = @ARGV;
+} else {
+    for ($j = 0; $j < $num_jobs; $j++) {
+        if ($j == $job_id) {
+            if (@ARGV > 0) { push @OUTPUTS, $ARGV[0]; }
+            else { push @OUTPUTS, "-"; }
+        } else {
+            push @OUTPUTS, "/dev/null";
+        }
+    }
+}
+
+if ($utt2spk_file ne "") {  # We have the --utt2spk option...
+    open($u_fh, '<', $utt2spk_file) || die "$0: Error opening utt2spk file $utt2spk_file: $!\n";
+    while(<$u_fh>) {
+        @A = split;
+        @A == 2 || die "$0: Bad line $_ in utt2spk file $utt2spk_file\n";
+        ($u,$s) = @A;
+        $utt2spk{$u} = $s;
+    }
+    close $u_fh;
+    open($i_fh, '<', $inscp) || die "$0: Error opening input scp file $inscp: $!\n";
+    @spkrs = ();
+    while(<$i_fh>) {
+        @A = split;
+        if(@A == 0) { die "$0: Empty or space-only line in scp file $inscp\n"; }
+        $u = $A[0];
+        $s = $utt2spk{$u};
+        defined $s || die "$0: No utterance $u in utt2spk file $utt2spk_file\n";
+        if(!defined $spk_count{$s}) {
+            push @spkrs, $s;
+            $spk_count{$s} = 0;
+            $spk_data{$s} = [];  # ref to new empty array.
+        }
+        $spk_count{$s}++;
+        push @{$spk_data{$s}}, $_;
+    }
+    # Now split as equally as possible ..
+    # First allocate spks to files by allocating an approximately
+    # equal number of speakers.
+    $numspks = @spkrs;  # number of speakers.
+    $numscps = @OUTPUTS; # number of output files.
+    if ($numspks < $numscps) {
+      die "$0: Refusing to split data because number of speakers $numspks " .
+          "is less than the number of output .scp files $numscps\n";
+    }
+    for($scpidx = 0; $scpidx < $numscps; $scpidx++) {
+        $scparray[$scpidx] = []; # [] is array reference.
+    }
+    for ($spkidx = 0; $spkidx < $numspks; $spkidx++) {
+        $scpidx = int(($spkidx*$numscps) / $numspks);
+        $spk = $spkrs[$spkidx];
+        push @{$scparray[$scpidx]}, $spk;
+        $scpcount[$scpidx] += $spk_count{$spk};
+    }
+
+    # Now will try to reassign beginning + ending speakers
+    # to different scp's and see if it gets more balanced.
+    # Suppose objf we're minimizing is sum_i (num utts in scp[i] - average)^2.
+    # We can show that if considering changing just 2 scp's, we minimize
+    # this by minimizing the squared difference in sizes.  This is
+    # equivalent to minimizing the absolute difference in sizes.  This
+    # shows this method is bound to converge.
+
+    $changed = 1;
+    while($changed) {
+        $changed = 0;
+        for($scpidx = 0; $scpidx < $numscps; $scpidx++) {
+            # First try to reassign ending spk of this scp.
+            if($scpidx < $numscps-1) {
+                $sz = @{$scparray[$scpidx]};
+                if($sz > 0) {
+                    $spk = $scparray[$scpidx]->[$sz-1];
+                    $count = $spk_count{$spk};
+                    $nutt1 = $scpcount[$scpidx];
+                    $nutt2 = $scpcount[$scpidx+1];
+                    if( abs( ($nutt2+$count) - ($nutt1-$count))
+                        < abs($nutt2 - $nutt1))  { # Would decrease
+                        # size-diff by reassigning spk...
+                        $scpcount[$scpidx+1] += $count;
+                        $scpcount[$scpidx] -= $count;
+                        pop @{$scparray[$scpidx]};
+                        unshift @{$scparray[$scpidx+1]}, $spk;
+                        $changed = 1;
+                    }
+                }
+            }
+            if($scpidx > 0 && @{$scparray[$scpidx]} > 0) {
+                $spk = $scparray[$scpidx]->[0];
+                $count = $spk_count{$spk};
+                $nutt1 = $scpcount[$scpidx-1];
+                $nutt2 = $scpcount[$scpidx];
+                if( abs( ($nutt2-$count) - ($nutt1+$count))
+                    < abs($nutt2 - $nutt1))  { # Would decrease
+                    # size-diff by reassigning spk...
+                    $scpcount[$scpidx-1] += $count;
+                    $scpcount[$scpidx] -= $count;
+                    shift @{$scparray[$scpidx]};
+                    push @{$scparray[$scpidx-1]}, $spk;
+                    $changed = 1;
+                }
+            }
+        }
+    }
+    # Now print out the files...
+    for($scpidx = 0; $scpidx < $numscps; $scpidx++) {
+        $scpfile = $OUTPUTS[$scpidx];
+        ($scpfile ne '-' ? open($f_fh, '>', $scpfile)
+                         : open($f_fh, '>&', \*STDOUT)) ||
+            die "$0: Could not open scp file $scpfile for writing: $!\n";
+        $count = 0;
+        if(@{$scparray[$scpidx]} == 0) {
+            print STDERR "$0: eError: split_scp.pl producing empty .scp file " .
+                         "$scpfile (too many splits and too few speakers?)\n";
+            $error = 1;
+        } else {
+            foreach $spk ( @{$scparray[$scpidx]} ) {
+                print $f_fh @{$spk_data{$spk}};
+                $count += $spk_count{$spk};
+            }
+            $count == $scpcount[$scpidx] || die "Count mismatch [code error]";
+        }
+        close($f_fh);
+    }
+} else {
+   # This block is the "normal" case where there is no --utt2spk
+   # option and we just break into equal size chunks.
+
+    open($i_fh, '<', $inscp) || die "$0: Error opening input scp file $inscp: $!\n";
+
+    $numscps = @OUTPUTS;  # size of array.
+    @F = ();
+    while(<$i_fh>) {
+        push @F, $_;
+    }
+    $numlines = @F;
+    if($numlines == 0) {
+        print STDERR "$0: error: empty input scp file $inscp\n";
+        $error = 1;
+    }
+    $linesperscp = int( $numlines / $numscps); # the "whole part"..
+    $linesperscp >= 1 || die "$0: You are splitting into too many pieces! [reduce \$nj ($numscps) to be smaller than the number of lines ($numlines) in $inscp]\n";
+    $remainder = $numlines - ($linesperscp * $numscps);
+    ($remainder >= 0 && $remainder < $numlines) || die "bad remainder $remainder";
+    # [just doing int() rounds down].
+    $n = 0;
+    for($scpidx = 0; $scpidx < @OUTPUTS; $scpidx++) {
+        $scpfile = $OUTPUTS[$scpidx];
+        ($scpfile ne '-' ? open($o_fh, '>', $scpfile)
+                         : open($o_fh, '>&', \*STDOUT)) ||
+            die "$0: Could not open scp file $scpfile for writing: $!\n";
+        for($k = 0; $k < $linesperscp + ($scpidx < $remainder ? 1 : 0); $k++) {
+            print $o_fh $F[$n++];
+        }
+        close($o_fh) || die "$0: Eror closing scp file $scpfile: $!\n";
+    }
+    $n == $numlines || die "$n != $numlines [code error]";
+}
+
+exit ($error);
diff --git a/egs/aishell2/transformer/utils/subset_data_dir_tr_cv.sh b/egs/aishell2/transformer/utils/subset_data_dir_tr_cv.sh
new file mode 100755
index 000000000..e16cebdf1
--- /dev/null
+++ b/egs/aishell2/transformer/utils/subset_data_dir_tr_cv.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+dev_num_utt=1000
+
+echo "$0 $@"
+. utils/parse_options.sh || exit 1;
+
+train_data=$1
+out_dir=$2
+
+[ ! -f ${train_data}/wav.scp ] && echo "$0: no such file ${train_data}/wav.scp" && exit 1;
+[ ! -f ${train_data}/text ] && echo "$0: no such file ${train_data}/text" && exit 1;
+
+mkdir -p ${out_dir}/train && mkdir -p ${out_dir}/dev
+
+cp ${train_data}/wav.scp ${out_dir}/train/wav.scp.bak
+cp ${train_data}/text ${out_dir}/train/text.bak
+
+num_utt=$(wc -l <${out_dir}/train/wav.scp.bak)
+
+utils/shuffle_list.pl --srand 1 ${out_dir}/train/wav.scp.bak > ${out_dir}/train/wav.scp.shuf
+head -n ${dev_num_utt} ${out_dir}/train/wav.scp.shuf > ${out_dir}/dev/wav.scp
+tail -n $((${num_utt}-${dev_num_utt})) ${out_dir}/train/wav.scp.shuf > ${out_dir}/train/wav.scp
+
+utils/shuffle_list.pl --srand 1 ${out_dir}/train/text.bak > ${out_dir}/train/text.shuf
+head -n ${dev_num_utt} ${out_dir}/train/text.shuf > ${out_dir}/dev/text
+tail -n $((${num_utt}-${dev_num_utt})) ${out_dir}/train/text.shuf > ${out_dir}/train/text
+
+rm ${out_dir}/train/wav.scp.bak ${out_dir}/train/text.bak
+rm ${out_dir}/train/wav.scp.shuf ${out_dir}/train/text.shuf
diff --git a/egs/aishell2/transformer/utils/text2token.py b/egs/aishell2/transformer/utils/text2token.py
new file mode 100755
index 000000000..56c39138f
--- /dev/null
+++ b/egs/aishell2/transformer/utils/text2token.py
@@ -0,0 +1,135 @@
+#!/usr/bin/env python3
+
+# Copyright 2017 Johns Hopkins University (Shinji Watanabe)
+#  Apache 2.0  (http://www.apache.org/licenses/LICENSE-2.0)
+
+
+import argparse
+import codecs
+import re
+import sys
+
+is_python2 = sys.version_info[0] == 2
+
+
+def exist_or_not(i, match_pos):
+    start_pos = None
+    end_pos = None
+    for pos in match_pos:
+        if pos[0] <= i < pos[1]:
+            start_pos = pos[0]
+            end_pos = pos[1]
+            break
+
+    return start_pos, end_pos
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="convert raw text to tokenized text",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--nchar",
+        "-n",
+        default=1,
+        type=int,
+        help="number of characters to split, i.e., \
+                        aabb -> a a b b with -n 1 and aa bb with -n 2",
+    )
+    parser.add_argument(
+        "--skip-ncols", "-s", default=0, type=int, help="skip first n columns"
+    )
+    parser.add_argument("--space", default="<space>", type=str, help="space symbol")
+    parser.add_argument(
+        "--non-lang-syms",
+        "-l",
+        default=None,
+        type=str,
+        help="list of non-linguistic symobles, e.g., <NOISE> etc.",
+    )
+    parser.add_argument("text", type=str, default=False, nargs="?", help="input text")
+    parser.add_argument(
+        "--trans_type",
+        "-t",
+        type=str,
+        default="char",
+        choices=["char", "phn"],
+        help="""Transcript type. char/phn. e.g., for TIMIT FADG0_SI1279 -
+                        If trans_type is char,
+                        read from SI1279.WRD file -> "bricks are an alternative"
+                        Else if trans_type is phn,
+                        read from SI1279.PHN file -> "sil b r ih sil k s aa r er n aa l
+                        sil t er n ih sil t ih v sil" """,
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    rs = []
+    if args.non_lang_syms is not None:
+        with codecs.open(args.non_lang_syms, "r", encoding="utf-8") as f:
+            nls = [x.rstrip() for x in f.readlines()]
+            rs = [re.compile(re.escape(x)) for x in nls]
+
+    if args.text:
+        f = codecs.open(args.text, encoding="utf-8")
+    else:
+        f = codecs.getreader("utf-8")(sys.stdin if is_python2 else sys.stdin.buffer)
+
+    sys.stdout = codecs.getwriter("utf-8")(
+        sys.stdout if is_python2 else sys.stdout.buffer
+    )
+    line = f.readline()
+    n = args.nchar
+    while line:
+        x = line.split()
+        print(" ".join(x[: args.skip_ncols]), end=" ")
+        a = " ".join(x[args.skip_ncols :])
+
+        # get all matched positions
+        match_pos = []
+        for r in rs:
+            i = 0
+            while i >= 0:
+                m = r.search(a, i)
+                if m:
+                    match_pos.append([m.start(), m.end()])
+                    i = m.end()
+                else:
+                    break
+
+        if args.trans_type == "phn":
+            a = a.split(" ")
+        else:
+            if len(match_pos) > 0:
+                chars = []
+                i = 0
+                while i < len(a):
+                    start_pos, end_pos = exist_or_not(i, match_pos)
+                    if start_pos is not None:
+                        chars.append(a[start_pos:end_pos])
+                        i = end_pos
+                    else:
+                        chars.append(a[i])
+                        i += 1
+                a = chars
+
+            a = [a[j : j + n] for j in range(0, len(a), n)]
+
+        a_flat = []
+        for z in a:
+            a_flat.append("".join(z))
+
+        a_chars = [z.replace(" ", args.space) for z in a_flat]
+        if args.trans_type == "phn":
+            a_chars = [z.replace("sil", args.space) for z in a_chars]
+        print(" ".join(a_chars))
+        line = f.readline()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/egs/aishell2/transformer/utils/text_tokenize.py b/egs/aishell2/transformer/utils/text_tokenize.py
new file mode 100755
index 000000000..962ea11bc
--- /dev/null
+++ b/egs/aishell2/transformer/utils/text_tokenize.py
@@ -0,0 +1,106 @@
+import re
+import argparse
+
+
+def load_dict(seg_file):
+    seg_dict = {}
+    with open(seg_file, 'r') as infile:
+        for line in infile:
+            s = line.strip().split()
+            key = s[0]
+            value = s[1:]
+            seg_dict[key] = " ".join(value)
+    return seg_dict
+
+
+def forward_segment(text, dic):
+    word_list = []
+    i = 0
+    while i < len(text):
+        longest_word = text[i]
+        for j in range(i + 1, len(text) + 1):
+            word = text[i:j]
+            if word in dic:
+                if len(word) > len(longest_word):
+                    longest_word = word
+        word_list.append(longest_word)
+        i += len(longest_word)
+    return word_list
+
+
+def tokenize(txt,
+             seg_dict):
+    out_txt = ""
+    pattern = re.compile(r"([\u4E00-\u9FA5A-Za-z0-9])")
+    for word in txt:
+        if pattern.match(word):
+            if word in seg_dict:
+                out_txt += seg_dict[word] + " "
+            else:
+                out_txt += "<unk>" + " "
+        else:
+            continue
+    return out_txt.strip()
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        description="text tokenize",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--text-file",
+        "-t",
+        default=False,
+        required=True,
+        type=str,
+        help="input text",
+    )
+    parser.add_argument(
+        "--seg-file",
+        "-s",
+        default=False,
+        required=True,
+        type=str,
+        help="seg file",
+    )
+    parser.add_argument(
+        "--txt-index",
+        "-i",
+        default=1,
+        required=True,
+        type=int,
+        help="txt index",
+    )
+    parser.add_argument(
+        "--output-dir",
+        "-o",
+        default=False,
+        required=True,
+        type=str,
+        help="output dir",
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+
+    txt_writer = open("{}/text.{}.txt".format(args.output_dir, args.txt_index), 'w')
+    shape_writer = open("{}/len.{}".format(args.output_dir, args.txt_index), 'w')
+    seg_dict = load_dict(args.seg_file)
+    with open(args.text_file, 'r') as infile:
+        for line in infile:
+            s = line.strip().split()
+            text_id = s[0]
+            text_list = forward_segment("".join(s[1:]).lower(), seg_dict)
+            text = tokenize(text_list, seg_dict)
+            lens = len(text.strip().split())
+            txt_writer.write(text_id + " " + text + '\n')
+            shape_writer.write(text_id + " " + str(lens) + '\n')
+
+
+if __name__ == '__main__':
+    main()
+
diff --git a/egs/aishell2/transformer/utils/text_tokenize.sh b/egs/aishell2/transformer/utils/text_tokenize.sh
new file mode 100755
index 000000000..6b74fef80
--- /dev/null
+++ b/egs/aishell2/transformer/utils/text_tokenize.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+
+# Begin configuration section.
+nj=32
+cmd=utils/run.pl
+
+echo "$0 $@"
+
+. utils/parse_options.sh || exit 1;
+
+# tokenize configuration
+text_dir=$1
+seg_file=$2
+logdir=$3
+output_dir=$4
+
+txt_dir=${output_dir}/txt; mkdir -p ${output_dir}/txt
+mkdir -p ${logdir}
+
+$cmd JOB=1:$nj $logdir/text_tokenize.JOB.log \
+  python utils/text_tokenize.py -t ${text_dir}/txt/text.JOB.txt \
+      -s ${seg_file} -i JOB -o ${txt_dir} \
+      || exit 1;
+
+# concatenate the text files together.
+for n in $(seq $nj); do
+  cat ${txt_dir}/text.$n.txt || exit 1
+done > ${output_dir}/text || exit 1
+
+for n in $(seq $nj); do
+  cat ${txt_dir}/len.$n || exit 1
+done > ${output_dir}/text_shape || exit 1
+
+echo "$0: Succeeded text tokenize"
diff --git a/egs/aishell2/transformer/utils/textnorm_zh.py b/egs/aishell2/transformer/utils/textnorm_zh.py
new file mode 100755
index 000000000..79feb83fd
--- /dev/null
+++ b/egs/aishell2/transformer/utils/textnorm_zh.py
@@ -0,0 +1,834 @@
+#!/usr/bin/env python3
+# coding=utf-8
+
+# Authors:
+#   2019.5 Zhiyang Zhou (https://github.com/Joee1995/chn_text_norm.git)
+#   2019.9 Jiayu DU
+#
+# requirements:
+#   - python 3.X
+# notes: python 2.X WILL fail or produce misleading results
+
+import sys, os, argparse, codecs, string, re
+
+# ================================================================================ #
+#                                    basic constant
+# ================================================================================ #
+CHINESE_DIGIS = u'零一二三四五六七八九'
+BIG_CHINESE_DIGIS_SIMPLIFIED = u'零壹贰叁肆伍陆柒捌玖'
+BIG_CHINESE_DIGIS_TRADITIONAL = u'零壹貳參肆伍陸柒捌玖'
+SMALLER_BIG_CHINESE_UNITS_SIMPLIFIED = u'十百千万'
+SMALLER_BIG_CHINESE_UNITS_TRADITIONAL = u'拾佰仟萬'
+LARGER_CHINESE_NUMERING_UNITS_SIMPLIFIED = u'亿兆京垓秭穰沟涧正载'
+LARGER_CHINESE_NUMERING_UNITS_TRADITIONAL = u'億兆京垓秭穰溝澗正載'
+SMALLER_CHINESE_NUMERING_UNITS_SIMPLIFIED = u'十百千万'
+SMALLER_CHINESE_NUMERING_UNITS_TRADITIONAL = u'拾佰仟萬'
+
+ZERO_ALT = u'〇'
+ONE_ALT = u'幺'
+TWO_ALTS = [u'两', u'兩']
+
+POSITIVE = [u'正', u'正']
+NEGATIVE = [u'负', u'負']
+POINT = [u'点', u'點']
+# PLUS = [u'加', u'加']
+# SIL = [u'杠', u'槓']
+
+FILLER_CHARS = ['呃', '啊']
+ER_WHITELIST = '(儿女|儿子|儿孙|女儿|儿媳|妻儿|' \
+             '胎儿|婴儿|新生儿|婴幼儿|幼儿|少儿|小儿|儿歌|儿童|儿科|托儿所|孤儿|' \
+             '儿戏|儿化|台儿庄|鹿儿岛|正儿八经|吊儿郎当|生儿育女|托儿带女|养儿防老|痴儿呆女|' \
+             '佳儿佳妇|儿怜兽扰|儿无常父|儿不嫌母丑|儿行千里母担忧|儿大不由爷|苏乞儿)'
+
+# 中文数字系统类型
+NUMBERING_TYPES = ['low', 'mid', 'high']
+
+CURRENCY_NAMES = '(人民币|美元|日元|英镑|欧元|马克|法郎|加拿大元|澳元|港币|先令|芬兰马克|爱尔兰镑|' \
+                 '里拉|荷兰盾|埃斯库多|比塞塔|印尼盾|林吉特|新西兰元|比索|卢布|新加坡元|韩元|泰铢)'
+CURRENCY_UNITS = '((亿|千万|百万|万|千|百)|(亿|千万|百万|万|千|百|)元|(亿|千万|百万|万|千|百|)块|角|毛|分)'
+COM_QUANTIFIERS = '(匹|张|座|回|场|尾|条|个|首|阙|阵|网|炮|顶|丘|棵|只|支|袭|辆|挑|担|颗|壳|窠|曲|墙|群|腔|' \
+                  '砣|座|客|贯|扎|捆|刀|令|打|手|罗|坡|山|岭|江|溪|钟|队|单|双|对|出|口|头|脚|板|跳|枝|件|贴|' \
+                  '针|线|管|名|位|身|堂|课|本|页|家|户|层|丝|毫|厘|分|钱|两|斤|担|铢|石|钧|锱|忽|(千|毫|微)克|' \
+                  '毫|厘|分|寸|尺|丈|里|寻|常|铺|程|(千|分|厘|毫|微)米|撮|勺|合|升|斗|石|盘|碗|碟|叠|桶|笼|盆|' \
+                  '盒|杯|钟|斛|锅|簋|篮|盘|桶|罐|瓶|壶|卮|盏|箩|箱|煲|啖|袋|钵|年|月|日|季|刻|时|周|天|秒|分|旬|' \
+                  '纪|岁|世|更|夜|春|夏|秋|冬|代|伏|辈|丸|泡|粒|颗|幢|堆|条|根|支|道|面|片|张|颗|块)'
+
+# punctuation information are based on Zhon project (https://github.com/tsroten/zhon.git)
+CHINESE_PUNC_STOP = '！？｡。'
+CHINESE_PUNC_NON_STOP = '＂＃＄％＆＇（）＊＋，－／：；＜＝＞＠［＼］＾＿｀｛｜｝～｟｠｢｣､、〃》「」『』【】〔〕〖〗〘〙〚〛〜〝〞〟〰〾〿–—‘’‛“”„‟…‧﹏'
+CHINESE_PUNC_LIST = CHINESE_PUNC_STOP + CHINESE_PUNC_NON_STOP
+
+# ================================================================================ #
+#                                    basic class
+# ================================================================================ #
+class ChineseChar(object):
+    """
+    中文字符
+    每个字符对应简体和繁体,
+    e.g. 简体 = '负', 繁体 = '負'
+    转换时可转换为简体或繁体
+    """
+
+    def __init__(self, simplified, traditional):
+        self.simplified = simplified
+        self.traditional = traditional
+        #self.__repr__ = self.__str__
+
+    def __str__(self):
+        return self.simplified or self.traditional or None
+
+    def __repr__(self):
+        return self.__str__()
+
+
+class ChineseNumberUnit(ChineseChar):
+    """
+    中文数字/数位字符
+    每个字符除繁简体外还有一个额外的大写字符
+    e.g. '陆' 和 '陸'
+    """
+
+    def __init__(self, power, simplified, traditional, big_s, big_t):
+        super(ChineseNumberUnit, self).__init__(simplified, traditional)
+        self.power = power
+        self.big_s = big_s
+        self.big_t = big_t
+
+    def __str__(self):
+        return '10^{}'.format(self.power)
+
+    @classmethod
+    def create(cls, index, value, numbering_type=NUMBERING_TYPES[1], small_unit=False):
+
+        if small_unit:
+            return ChineseNumberUnit(power=index + 1,
+                                     simplified=value[0], traditional=value[1], big_s=value[1], big_t=value[1])
+        elif numbering_type == NUMBERING_TYPES[0]:
+            return ChineseNumberUnit(power=index + 8,
+                                     simplified=value[0], traditional=value[1], big_s=value[0], big_t=value[1])
+        elif numbering_type == NUMBERING_TYPES[1]:
+            return ChineseNumberUnit(power=(index + 2) * 4,
+                                     simplified=value[0], traditional=value[1], big_s=value[0], big_t=value[1])
+        elif numbering_type == NUMBERING_TYPES[2]:
+            return ChineseNumberUnit(power=pow(2, index + 3),
+                                     simplified=value[0], traditional=value[1], big_s=value[0], big_t=value[1])
+        else:
+            raise ValueError(
+                'Counting type should be in {0} ({1} provided).'.format(NUMBERING_TYPES, numbering_type))
+
+
+class ChineseNumberDigit(ChineseChar):
+    """
+    中文数字字符
+    """
+
+    def __init__(self, value, simplified, traditional, big_s, big_t, alt_s=None, alt_t=None):
+        super(ChineseNumberDigit, self).__init__(simplified, traditional)
+        self.value = value
+        self.big_s = big_s
+        self.big_t = big_t
+        self.alt_s = alt_s
+        self.alt_t = alt_t
+
+    def __str__(self):
+        return str(self.value)
+
+    @classmethod
+    def create(cls, i, v):
+        return ChineseNumberDigit(i, v[0], v[1], v[2], v[3])
+
+
+class ChineseMath(ChineseChar):
+    """
+    中文数位字符
+    """
+
+    def __init__(self, simplified, traditional, symbol, expression=None):
+        super(ChineseMath, self).__init__(simplified, traditional)
+        self.symbol = symbol
+        self.expression = expression
+        self.big_s = simplified
+        self.big_t = traditional
+
+
+CC, CNU, CND, CM = ChineseChar, ChineseNumberUnit, ChineseNumberDigit, ChineseMath
+
+
+class NumberSystem(object):
+    """
+    中文数字系统
+    """
+    pass
+
+
+class MathSymbol(object):
+    """
+    用于中文数字系统的数学符号 (繁/简体), e.g.
+    positive = ['正', '正']
+    negative = ['负', '負']
+    point = ['点', '點']
+    """
+
+    def __init__(self, positive, negative, point):
+        self.positive = positive
+        self.negative = negative
+        self.point = point
+
+    def __iter__(self):
+        for v in self.__dict__.values():
+            yield v
+
+
+# class OtherSymbol(object):
+#     """
+#     其他符号
+#     """
+#
+#     def __init__(self, sil):
+#         self.sil = sil
+#
+#     def __iter__(self):
+#         for v in self.__dict__.values():
+#             yield v
+
+
+# ================================================================================ #
+#                                    basic utils
+# ================================================================================ #
+def create_system(numbering_type=NUMBERING_TYPES[1]):
+    """
+    根据数字系统类型返回创建相应的数字系统，默认为 mid
+    NUMBERING_TYPES = ['low', 'mid', 'high']: 中文数字系统类型
+        low:  '兆' = '亿' * '十' = $10^{9}$,  '京' = '兆' * '十', etc.
+        mid:  '兆' = '亿' * '万' = $10^{12}$, '京' = '兆' * '万', etc.
+        high: '兆' = '亿' * '亿' = $10^{16}$, '京' = '兆' * '兆', etc.
+    返回对应的数字系统
+    """
+
+    # chinese number units of '亿' and larger
+    all_larger_units = zip(
+        LARGER_CHINESE_NUMERING_UNITS_SIMPLIFIED, LARGER_CHINESE_NUMERING_UNITS_TRADITIONAL)
+    larger_units = [CNU.create(i, v, numbering_type, False)
+                    for i, v in enumerate(all_larger_units)]
+    # chinese number units of '十, 百, 千, 万'
+    all_smaller_units = zip(
+        SMALLER_CHINESE_NUMERING_UNITS_SIMPLIFIED, SMALLER_CHINESE_NUMERING_UNITS_TRADITIONAL)
+    smaller_units = [CNU.create(i, v, small_unit=True)
+                     for i, v in enumerate(all_smaller_units)]
+    # digis
+    chinese_digis = zip(CHINESE_DIGIS, CHINESE_DIGIS,
+                        BIG_CHINESE_DIGIS_SIMPLIFIED, BIG_CHINESE_DIGIS_TRADITIONAL)
+    digits = [CND.create(i, v) for i, v in enumerate(chinese_digis)]
+    digits[0].alt_s, digits[0].alt_t = ZERO_ALT, ZERO_ALT
+    digits[1].alt_s, digits[1].alt_t = ONE_ALT, ONE_ALT
+    digits[2].alt_s, digits[2].alt_t = TWO_ALTS[0], TWO_ALTS[1]
+
+    # symbols
+    positive_cn = CM(POSITIVE[0], POSITIVE[1], '+', lambda x: x)
+    negative_cn = CM(NEGATIVE[0], NEGATIVE[1], '-', lambda x: -x)
+    point_cn = CM(POINT[0], POINT[1], '.', lambda x,
+                  y: float(str(x) + '.' + str(y)))
+    # sil_cn = CM(SIL[0], SIL[1], '-', lambda x, y: float(str(x) + '-' + str(y)))
+    system = NumberSystem()
+    system.units = smaller_units + larger_units
+    system.digits = digits
+    system.math = MathSymbol(positive_cn, negative_cn, point_cn)
+    # system.symbols = OtherSymbol(sil_cn)
+    return system
+
+
+def chn2num(chinese_string, numbering_type=NUMBERING_TYPES[1]):
+
+    def get_symbol(char, system):
+        for u in system.units:
+            if char in [u.traditional, u.simplified, u.big_s, u.big_t]:
+                return u
+        for d in system.digits:
+            if char in [d.traditional, d.simplified, d.big_s, d.big_t, d.alt_s, d.alt_t]:
+                return d
+        for m in system.math:
+            if char in [m.traditional, m.simplified]:
+                return m
+
+    def string2symbols(chinese_string, system):
+        int_string, dec_string = chinese_string, ''
+        for p in [system.math.point.simplified, system.math.point.traditional]:
+            if p in chinese_string:
+                int_string, dec_string = chinese_string.split(p)
+                break
+        return [get_symbol(c, system) for c in int_string], \
+               [get_symbol(c, system) for c in dec_string]
+
+    def correct_symbols(integer_symbols, system):
+        """
+        一百八 to 一百八十
+        一亿一千三百万 to 一亿 一千万 三百万
+        """
+
+        if integer_symbols and isinstance(integer_symbols[0], CNU):
+            if integer_symbols[0].power == 1:
+                integer_symbols = [system.digits[1]] + integer_symbols
+
+        if len(integer_symbols) > 1:
+            if isinstance(integer_symbols[-1], CND) and isinstance(integer_symbols[-2], CNU):
+                integer_symbols.append(
+                    CNU(integer_symbols[-2].power - 1, None, None, None, None))
+
+        result = []
+        unit_count = 0
+        for s in integer_symbols:
+            if isinstance(s, CND):
+                result.append(s)
+                unit_count = 0
+            elif isinstance(s, CNU):
+                current_unit = CNU(s.power, None, None, None, None)
+                unit_count += 1
+
+            if unit_count == 1:
+                result.append(current_unit)
+            elif unit_count > 1:
+                for i in range(len(result)):
+                    if isinstance(result[-i - 1], CNU) and result[-i - 1].power < current_unit.power:
+                        result[-i - 1] = CNU(result[-i - 1].power +
+                                             current_unit.power, None, None, None, None)
+        return result
+
+    def compute_value(integer_symbols):
+        """
+        Compute the value.
+        When current unit is larger than previous unit, current unit * all previous units will be used as all previous units.
+        e.g. '两千万' = 2000 * 10000 not 2000 + 10000
+        """
+        value = [0]
+        last_power = 0
+        for s in integer_symbols:
+            if isinstance(s, CND):
+                value[-1] = s.value
+            elif isinstance(s, CNU):
+                value[-1] *= pow(10, s.power)
+                if s.power > last_power:
+                    value[:-1] = list(map(lambda v: v *
+                                                    pow(10, s.power), value[:-1]))
+                    last_power = s.power
+                value.append(0)
+        return sum(value)
+
+    system = create_system(numbering_type)
+    int_part, dec_part = string2symbols(chinese_string, system)
+    int_part = correct_symbols(int_part, system)
+    int_str = str(compute_value(int_part))
+    dec_str = ''.join([str(d.value) for d in dec_part])
+    if dec_part:
+        return '{0}.{1}'.format(int_str, dec_str)
+    else:
+        return int_str
+
+
+def num2chn(number_string, numbering_type=NUMBERING_TYPES[1], big=False,
+            traditional=False, alt_zero=False, alt_one=False, alt_two=True,
+            use_zeros=True, use_units=True):
+
+    def get_value(value_string, use_zeros=True):
+
+        striped_string = value_string.lstrip('0')
+
+        # record nothing if all zeros
+        if not striped_string:
+            return []
+
+        # record one digits
+        elif len(striped_string) == 1:
+            if use_zeros and len(value_string) != len(striped_string):
+                return [system.digits[0], system.digits[int(striped_string)]]
+            else:
+                return [system.digits[int(striped_string)]]
+
+        # recursively record multiple digits
+        else:
+            result_unit = next(u for u in reversed(
+                system.units) if u.power < len(striped_string))
+            result_string = value_string[:-result_unit.power]
+            return get_value(result_string) + [result_unit] + get_value(striped_string[-result_unit.power:])
+
+    system = create_system(numbering_type)
+
+    int_dec = number_string.split('.')
+    if len(int_dec) == 1:
+        int_string = int_dec[0]
+        dec_string = ""
+    elif len(int_dec) == 2:
+        int_string = int_dec[0]
+        dec_string = int_dec[1]
+    else:
+        raise ValueError(
+            "invalid input num string with more than one dot: {}".format(number_string))
+
+    if use_units and len(int_string) > 1:
+        result_symbols = get_value(int_string)
+    else:
+        result_symbols = [system.digits[int(c)] for c in int_string]
+    dec_symbols = [system.digits[int(c)] for c in dec_string]
+    if dec_string:
+        result_symbols += [system.math.point] + dec_symbols
+
+    if alt_two:
+        liang = CND(2, system.digits[2].alt_s, system.digits[2].alt_t,
+                    system.digits[2].big_s, system.digits[2].big_t)
+        for i, v in enumerate(result_symbols):
+            if isinstance(v, CND) and v.value == 2:
+                next_symbol = result_symbols[i +
+                                             1] if i < len(result_symbols) - 1 else None
+                previous_symbol = result_symbols[i - 1] if i > 0 else None
+                if isinstance(next_symbol, CNU) and isinstance(previous_symbol, (CNU, type(None))):
+                    if next_symbol.power != 1 and ((previous_symbol is None) or (previous_symbol.power != 1)):
+                        result_symbols[i] = liang
+
+    # if big is True, '两' will not be used and `alt_two` has no impact on output
+    if big:
+        attr_name = 'big_'
+        if traditional:
+            attr_name += 't'
+        else:
+            attr_name += 's'
+    else:
+        if traditional:
+            attr_name = 'traditional'
+        else:
+            attr_name = 'simplified'
+
+    result = ''.join([getattr(s, attr_name) for s in result_symbols])
+
+    # if not use_zeros:
+    #     result = result.strip(getattr(system.digits[0], attr_name))
+
+    if alt_zero:
+        result = result.replace(
+            getattr(system.digits[0], attr_name), system.digits[0].alt_s)
+
+    if alt_one:
+        result = result.replace(
+            getattr(system.digits[1], attr_name), system.digits[1].alt_s)
+
+    for i, p in enumerate(POINT):
+        if result.startswith(p):
+            return CHINESE_DIGIS[0] + result
+
+    # ^10, 11, .., 19
+    if len(result) >= 2 and result[1] in [SMALLER_CHINESE_NUMERING_UNITS_SIMPLIFIED[0],
+                                          SMALLER_CHINESE_NUMERING_UNITS_TRADITIONAL[0]] and \
+            result[0] in [CHINESE_DIGIS[1], BIG_CHINESE_DIGIS_SIMPLIFIED[1], BIG_CHINESE_DIGIS_TRADITIONAL[1]]:
+        result = result[1:]
+
+    return result
+
+
+# ================================================================================ #
+#                          different types of rewriters
+# ================================================================================ #
+class Cardinal:
+    """
+    CARDINAL类
+    """
+
+    def __init__(self, cardinal=None, chntext=None):
+        self.cardinal = cardinal
+        self.chntext = chntext
+
+    def chntext2cardinal(self):
+        return chn2num(self.chntext)
+
+    def cardinal2chntext(self):
+        return num2chn(self.cardinal)
+
+class Digit:
+    """
+    DIGIT类
+    """
+
+    def __init__(self, digit=None, chntext=None):
+        self.digit = digit
+        self.chntext = chntext
+
+    # def chntext2digit(self):
+    #     return chn2num(self.chntext)
+
+    def digit2chntext(self):
+        return num2chn(self.digit, alt_two=False, use_units=False)
+
+
+class TelePhone:
+    """
+    TELEPHONE类
+    """
+
+    def __init__(self, telephone=None, raw_chntext=None, chntext=None):
+        self.telephone = telephone
+        self.raw_chntext = raw_chntext
+        self.chntext = chntext
+
+    # def chntext2telephone(self):
+    #     sil_parts = self.raw_chntext.split('<SIL>')
+    #     self.telephone = '-'.join([
+    #         str(chn2num(p)) for p in sil_parts
+    #     ])
+    #     return self.telephone
+
+    def telephone2chntext(self, fixed=False):
+
+        if fixed:
+            sil_parts = self.telephone.split('-')
+            self.raw_chntext = '<SIL>'.join([
+                num2chn(part, alt_two=False, use_units=False) for part in sil_parts
+            ])
+            self.chntext = self.raw_chntext.replace('<SIL>', '')
+        else:
+            sp_parts = self.telephone.strip('+').split()
+            self.raw_chntext = '<SP>'.join([
+                num2chn(part, alt_two=False, use_units=False) for part in sp_parts
+            ])
+            self.chntext = self.raw_chntext.replace('<SP>', '')
+        return self.chntext
+
+
+class Fraction:
+    """
+    FRACTION类
+    """
+
+    def __init__(self, fraction=None, chntext=None):
+        self.fraction = fraction
+        self.chntext = chntext
+
+    def chntext2fraction(self):
+        denominator, numerator = self.chntext.split('分之')
+        return chn2num(numerator) + '/' + chn2num(denominator)
+
+    def fraction2chntext(self):
+        numerator, denominator = self.fraction.split('/')
+        return num2chn(denominator) + '分之' + num2chn(numerator)
+
+
+class Date:
+    """
+    DATE类
+    """
+
+    def __init__(self, date=None, chntext=None):
+        self.date = date
+        self.chntext = chntext
+
+    # def chntext2date(self):
+    #     chntext = self.chntext
+    #     try:
+    #         year, other = chntext.strip().split('年', maxsplit=1)
+    #         year = Digit(chntext=year).digit2chntext() + '年'
+    #     except ValueError:
+    #         other = chntext
+    #         year = ''
+    #     if other:
+    #         try:
+    #             month, day = other.strip().split('月', maxsplit=1)
+    #             month = Cardinal(chntext=month).chntext2cardinal() + '月'
+    #         except ValueError:
+    #             day = chntext
+    #             month = ''
+    #         if day:
+    #             day = Cardinal(chntext=day[:-1]).chntext2cardinal() + day[-1]
+    #     else:
+    #         month = ''
+    #         day = ''
+    #     date = year + month + day
+    #     self.date = date
+    #     return self.date
+
+    def date2chntext(self):
+        date = self.date
+        try:
+            year, other = date.strip().split('年', 1)
+            year = Digit(digit=year).digit2chntext() + '年'
+        except ValueError:
+            other = date
+            year = ''
+        if other:
+            try:
+                month, day = other.strip().split('月', 1)
+                month = Cardinal(cardinal=month).cardinal2chntext() + '月'
+            except ValueError:
+                day = date
+                month = ''
+            if day:
+                day = Cardinal(cardinal=day[:-1]).cardinal2chntext() + day[-1]
+        else:
+            month = ''
+            day = ''
+        chntext = year + month + day
+        self.chntext = chntext
+        return self.chntext
+
+
+class Money:
+    """
+    MONEY类
+    """
+
+    def __init__(self, money=None, chntext=None):
+        self.money = money
+        self.chntext = chntext
+
+    # def chntext2money(self):
+    #     return self.money
+
+    def money2chntext(self):
+        money = self.money
+        pattern = re.compile(r'(\d+(\.\d+)?)')
+        matchers = pattern.findall(money)
+        if matchers:
+            for matcher in matchers:
+                money = money.replace(matcher[0], Cardinal(cardinal=matcher[0]).cardinal2chntext())
+        self.chntext = money
+        return self.chntext
+
+
+class Percentage:
+    """
+    PERCENTAGE类
+    """
+
+    def __init__(self, percentage=None, chntext=None):
+        self.percentage = percentage
+        self.chntext = chntext
+
+    def chntext2percentage(self):
+        return chn2num(self.chntext.strip().strip('百分之')) + '%'
+
+    def percentage2chntext(self):
+        return '百分之' + num2chn(self.percentage.strip().strip('%'))
+
+
+def remove_erhua(text, er_whitelist):
+    """
+    去除儿化音词中的儿:
+    他女儿在那边儿 -> 他女儿在那边
+    """
+
+    er_pattern = re.compile(er_whitelist)
+    new_str=''
+    while re.search('儿',text):
+        a = re.search('儿',text).span()
+        remove_er_flag = 0
+
+        if er_pattern.search(text):
+            b = er_pattern.search(text).span()
+            if b[0] <= a[0]:
+                remove_er_flag = 1
+
+        if remove_er_flag == 0 :
+            new_str = new_str + text[0:a[0]]
+            text = text[a[1]:]
+        else:
+            new_str = new_str + text[0:b[1]]
+            text = text[b[1]:]
+
+    text = new_str + text
+    return text
+
+# ================================================================================ #
+#                            NSW Normalizer
+# ================================================================================ #
+class NSWNormalizer:
+    def __init__(self, raw_text):
+        self.raw_text = '^' + raw_text + '$'
+        self.norm_text = ''
+
+    def _particular(self):
+        text = self.norm_text
+        pattern = re.compile(r"(([a-zA-Z]+)二([a-zA-Z]+))")
+        matchers = pattern.findall(text)
+        if matchers:
+            # print('particular')
+            for matcher in matchers:
+                text = text.replace(matcher[0], matcher[1]+'2'+matcher[2], 1)
+        self.norm_text = text
+        return self.norm_text
+
+    def normalize(self):
+        text = self.raw_text
+
+        # 规范化日期
+        pattern = re.compile(r"\D+((([089]\d|(19|20)\d{2})年)?(\d{1,2}月(\d{1,2}[日号])?)?)")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('date')
+            for matcher in matchers:
+                text = text.replace(matcher[0], Date(date=matcher[0]).date2chntext(), 1)
+
+        # 规范化金钱
+        pattern = re.compile(r"\D+((\d+(\.\d+)?)[多余几]?" + CURRENCY_UNITS + r"(\d" + CURRENCY_UNITS + r"?)?)")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('money')
+            for matcher in matchers:
+                text = text.replace(matcher[0], Money(money=matcher[0]).money2chntext(), 1)
+
+        # 规范化固话/手机号码
+        # 手机
+        # http://www.jihaoba.com/news/show/13680
+        # 移动：139、138、137、136、135、134、159、158、157、150、151、152、188、187、182、183、184、178、198
+        # 联通：130、131、132、156、155、186、185、176
+        # 电信：133、153、189、180、181、177
+        pattern = re.compile(r"\D((\+?86 ?)?1([38]\d|5[0-35-9]|7[678]|9[89])\d{8})\D")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('telephone')
+            for matcher in matchers:
+                text = text.replace(matcher[0], TelePhone(telephone=matcher[0]).telephone2chntext(), 1)
+        # 固话
+        pattern = re.compile(r"\D((0(10|2[1-3]|[3-9]\d{2})-?)?[1-9]\d{6,7})\D")
+        matchers = pattern.findall(text)
+        if matchers:
+            # print('fixed telephone')
+            for matcher in matchers:
+                text = text.replace(matcher[0], TelePhone(telephone=matcher[0]).telephone2chntext(fixed=True), 1)
+
+        # 规范化分数
+        pattern = re.compile(r"(\d+/\d+)")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('fraction')
+            for matcher in matchers:
+                text = text.replace(matcher, Fraction(fraction=matcher).fraction2chntext(), 1)
+
+        # 规范化百分数
+        text = text.replace('％', '%')
+        pattern = re.compile(r"(\d+(\.\d+)?%)")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('percentage')
+            for matcher in matchers:
+                text = text.replace(matcher[0], Percentage(percentage=matcher[0]).percentage2chntext(), 1)
+
+        # 规范化纯数+量词
+        pattern = re.compile(r"(\d+(\.\d+)?)[多余几]?" + COM_QUANTIFIERS)
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('cardinal+quantifier')
+            for matcher in matchers:
+                text = text.replace(matcher[0], Cardinal(cardinal=matcher[0]).cardinal2chntext(), 1)
+
+        # 规范化数字编号
+        pattern = re.compile(r"(\d{4,32})")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('digit')
+            for matcher in matchers:
+                text = text.replace(matcher, Digit(digit=matcher).digit2chntext(), 1)
+
+        # 规范化纯数
+        pattern = re.compile(r"(\d+(\.\d+)?)")
+        matchers = pattern.findall(text)
+        if matchers:
+            #print('cardinal')
+            for matcher in matchers:
+                text = text.replace(matcher[0], Cardinal(cardinal=matcher[0]).cardinal2chntext(), 1)
+
+        self.norm_text = text
+        self._particular()
+
+        return self.norm_text.lstrip('^').rstrip('$')
+
+
+def nsw_test_case(raw_text):
+    print('I:' + raw_text)
+    print('O:' + NSWNormalizer(raw_text).normalize())
+    print('')
+
+
+def nsw_test():
+    nsw_test_case('固话：0595-23865596或23880880。')
+    nsw_test_case('固话：0595-23865596或23880880。')
+    nsw_test_case('手机：+86 19859213959或15659451527。')
+    nsw_test_case('分数：32477/76391。')
+    nsw_test_case('百分数：80.03%。')
+    nsw_test_case('编号：31520181154418。')
+    nsw_test_case('纯数：2983.07克或12345.60米。')
+    nsw_test_case('日期：1999年2月20日或09年3月15号。')
+    nsw_test_case('金钱：12块5，34.5元，20.1万')
+    nsw_test_case('特殊：O2O或B2C。')
+    nsw_test_case('3456万吨')
+    nsw_test_case('2938个')
+    nsw_test_case('938')
+    nsw_test_case('今天吃了115个小笼包231个馒头')
+    nsw_test_case('有62％的概率')
+
+
+if __name__ == '__main__':
+    #nsw_test()
+
+    p = argparse.ArgumentParser()
+    p.add_argument('ifile', help='input filename, assume utf-8 encoding')
+    p.add_argument('ofile', help='output filename')
+    p.add_argument('--to_upper', action='store_true', help='convert to upper case')
+    p.add_argument('--to_lower', action='store_true', help='convert to lower case')
+    p.add_argument('--has_key', action='store_true', help="input text has Kaldi's key as first field.")
+    p.add_argument('--remove_fillers', type=bool, default=True, help='remove filler chars such as "呃, 啊"')
+    p.add_argument('--remove_erhua', type=bool, default=True, help='remove erhua chars such as "这儿"')
+    p.add_argument('--log_interval', type=int, default=10000, help='log interval in number of processed lines')
+    args = p.parse_args()
+
+    ifile = codecs.open(args.ifile, 'r', 'utf8')
+    ofile = codecs.open(args.ofile, 'w+', 'utf8')
+
+    n = 0
+    for l in ifile:
+        key = ''
+        text = ''
+        if args.has_key:
+            cols = l.split(maxsplit=1)
+            key = cols[0]
+            if len(cols) == 2:
+                text = cols[1].strip()
+            else:
+                text = ''
+        else:
+            text = l.strip()
+
+        # cases
+        if args.to_upper and args.to_lower:
+            sys.stderr.write('text norm: to_upper OR to_lower?')
+            exit(1)
+        if args.to_upper:
+            text = text.upper()
+        if args.to_lower:
+            text = text.lower()
+
+        # Filler chars removal
+        if args.remove_fillers:
+            for ch in FILLER_CHARS:
+                text = text.replace(ch, '')
+
+        if args.remove_erhua:
+            text = remove_erhua(text, ER_WHITELIST)
+
+        # NSW(Non-Standard-Word) normalization
+        text = NSWNormalizer(text).normalize()
+
+        # Punctuations removal
+        old_chars = CHINESE_PUNC_LIST + string.punctuation # includes all CN and EN punctuations
+        new_chars = ' ' * len(old_chars)
+        del_chars = ''
+        text = text.translate(str.maketrans(old_chars, new_chars, del_chars))
+
+        #
+        if args.has_key:
+            ofile.write(key + '\t' + text + '\n')
+        else:
+            ofile.write(text + '\n')
+
+        n += 1
+        if n % args.log_interval == 0:
+            sys.stderr.write("text norm: {} lines done.\n".format(n))
+
+    sys.stderr.write("text norm: {} lines done in total.\n".format(n))
+
+    ifile.close()
+    ofile.close()