TypeError: __init__() got an unexpected keyword argument ‘max_len‘

Problem Descriptions:
When I implement a Chinese character-based Bert tokenizer, I need first to extend the BertTokenizer model, then initiate the parameters, and finally create a character-based tokenizer method.
The following is the parameter initalization code.

class BERTChineseCharacterTokenizer(BertTokenizer):
    def __init__(self, vocab_file, do_lower_case=True):