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README.md

 # chatyuan-api
 
 An API for ChatYuan.
+
+## Usage
+
+- `POST http://localhost`
+  - text: The conversation text.
+
+```json
+{
+  "success": true,
+  "statusCode": 200,
+  "message": "success",
+  "data": {
+    "text": "Hello, world!"
+  }
+}
+```