def split_to_mini_sentence(words: list, word_limit: int = 20):
    assert word_limit > 1
    if len(words) <= word_limit:
        return [words]
    sentences = []
    length = len(words)
    sentence_len = length // word_limit
    for i in range(sentence_len):
        sentences.append(words[i * word_limit:(i + 1) * word_limit])
    if length % word_limit > 0:
        sentences.append(words[sentence_len * word_limit:])
    return sentences


def split_words(text: str):
    words = []
    segs = text.split()
    for seg in segs:
        # There is no space in seg.
        current_word = ""
        for c in seg:
            if len(c.encode()) == 1:
                # This is an ASCII char.
                current_word += c
            else:
                # This is a Chinese char.
                if len(current_word) > 0:
                    words.append(current_word)
                    current_word = ""
                words.append(c)
        if len(current_word) > 0:
            words.append(current_word)
    
    return words