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README.md

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+## Usage
+Please use BertTokenizerFast as tokenizer instead of AutoTokenizer.
+請使用 BertTokenizerFast 而非 AutoTokenizer。
+```
+from transformers import (
+  BertTokenizerFast,
+  AutoModelForCausalLM,
+)
+
+tokenizer = BertTokenizerFast.from_pretrained('bert-base-chinese')
+model = AutoModelForCausalLM.from_pretrained('ckiplab/gpt2-base-chinese')
+```
+### Input Format
+```
+C' = [c1, c2, ..., [HL], a1, ..., a|A|, [HL], ..., c|C|]
+```
+### Input Example
+```
+哈利·波特是英國作家[HL]羅琳[HL]撰寫的七部幻想小說系列。
+```
+> 誰撰寫哈利·波特?