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README.md

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+## 介绍
+tf版本 https://github.com/ZhuiyiTechnology/roformer
+pytorch版本 https://github.com/JunnYu/RoFormer_pytorch
+
+## 使用
+```python
+git clone https://github.com/JunnYu/RoFormer_pytorch
+cd RoFormer_pytorch
+import torch
+from model import RoFormerModel, RoFormerTokenizer
+tokenizer = RoFormerTokenizer.from_pretrained("junnyu/roformer_chinese_base")
+model = RoFormerModel.from_pretrained("junnyu/roformer_chinese_base")
+inputs = tokenizer(text, return_tensors="pt")
+with torch.no_grad():
+    outputs = model(**inputs).last_hidden_state
+print(outputs.shape)
+```