Update README_CN.md

deploy/pdserving/README_CN.md

@@ -244,6 +244,7 @@ cp -rf general_detection_op.cpp Serving/core/general-server/op
     }
    ```
    启动客户端
+   
     ```
     python3 ocr_cpp_client.py ppocrv2_det_client ppocrv2_rec_client
     ```