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+[TOC]
+
+### 如何使用？
+
+`python版本：3.6 - 3.8`
+
+`WebSocketAPI：建议websockets库版本为6.0`
+
+#### 第一步：下载SDK，安装相关所需库
+
+1.1 下载`python SDK`
+
+* 将SDK目录`Clone`或者`Download`到本地，选择使用`okx-python-sdk-api-v5`即可
+
+1.2 安装所需库
+
+```python
+pip install requests
+pip install websockets==6.0
+```
+
+#### 第二步：配置个人信息
+
+2.1 如果还未有API，可[点击](https://www.okx.com/account/users/myApi)前往官网进行申请
+
+2.2 将各项信息在`example.py（RestAPI）`和`websocket_example.py（WebSocketAPI）`中填写
+
+```python
+api_key = ""
+secret_key = ""
+passphrase = ""
+```
+
+#### 第三步：调用接口
+
+* RestAPI
+
+  * 运行`example.py`
+
+  * 解开相应方法的注释传参调用各接口即可
+
+* WebSocketAPI
+
+  * 运行`websocket_example.py`
+
+  * 根据`公共频道`/`私有频道`/`交易`选择对应`url`、对应启动方法，传入相应参数即可
+
+  ```python
+  # WebSocket公共频道
+  url = "wss://ws.okx.com:8443/ws/v5/public?brokerId=9999"
+  
+  # WebSocket私有频道
+  url = "wss://ws.okx.com:8443/ws/v5/private?brokerId=9999"
+  ```
+
+  ```python
+  # 公共频道 不需要登录（行情，持仓总量，K线，标记价格，深度，资金费率等）
+  loop.run_until_complete(subscribe_without_login(url, channels))
+  
+  # 私有频道 需要登录（账户，持仓，订单等）
+  loop.run_until_complete(subscribe(url, api_key, passphrase, seceret_key, channels))
+  
+  # 交易（下单，撤单，改单等）
+  loop.run_until_complete(trade(url, api_key, passphrase, seceret_key, trade_param))
+  ```
+
+附言：
+
+* 如果对API尚不了解，建议参考`OKx`官方[API文档](https://www.okx.com/docs-v5/zh/)
+
+* 使用RestAPI的用户可以通过设置`example.py`文件下的flag参数来选择接入实盘或者模拟盘
+
+* 使用WebSocketAPI的用户可以通过解开`websocket_example.py`文件下对应的url注释来选择接入实盘或者模拟盘
+
+* RestAPI 提供了http2的请求方式,可参考http2_example.py
+
+* 若使用`WebSocketAPI`遇到问题建议参考相关链接
+
+  * `asyncio`、`websockets`文档/`github`：
+
+        https://docs.python.org/3/library/asyncio-dev.html
+        https://websockets.readthedocs.io/en/stable/intro.html
+        https://github.com/aaugustin/websockets
+
+  * 关于`code=1006`：
+
+        https://github.com/Rapptz/discord.py/issues/1996
+        https://github.com/aaugustin/websockets/issues/587
+
+
+
+### How to use ?
+
+`python version：3.6 - 3.8`
+
+`WebSocketAPI： websockets package advise version 6.0`
+
+#### Step 1: Download the SDK and install the necessary libraries
+
+1.1 Download python SDK 
+
+- `Clone` or `Download` the SDK directory to your local directory,choose to use `okx-python-sdk-api-v5`
+
+1.2 Install the necessary libraries
+
+```python
+pip install requests
+pip install websockets==6.0
+```
+
+#### Step 2: Configure Personal Information
+
+2.1 If you have no API，[Click here](https://www.okx.com/account/users/myApi) to the official websit to apply for the API
+
+2.2 Fill out all necessary informatiuon in `example.py（RestAPI）`  and `websocket_example.py（WebSocketAPI）`
+
+```python 
+api_key = ""
+secret_key = ""
+passphrase = ""
+```
+
+#### Step 3: Call API 
+
+- RestAPI
+  - Run `example.py`
+  - Uncomment the corresponding method and then pass the arguments and call the interfaces
+- WebSocketAPI
+  - Run `websocket_example.py`
+  - According to the `public channel`/`private channel`/`trade`, select the corresponding `url`, the corresponding start method, and pass in the corresponding parameters
+
+```python 
+# WebSocket public channel
+url = "wss://ws.okx.com:8443/ws/v5/public?brokerId=9999"
+
+# WebSocket private channel
+url = "wss://ws.okx.com:8443/ws/v5/private?brokerId=9999"
+```
+
+```Python
+# Not necessary for public channel to login （Instrument, Tickers, Index, Mark price, Order Book, Funding rate, etc）
+loop.run_until_complete(subscribe_without_login(url, channels))
+
+# necessary for private channel to login（Account,Positions, Order, etc）
+loop.run_until_complete(subscribe(url, api_key, passphrase, seceret_key, channels))
+
+# trade（Place Order, Cancel Order, Amend Order, etc）
+loop.run_until_complete(trade(url, api_key, passphrase, seceret_key, trade_param))
+```
+
+P.S. 
+
+- If  you know little about API, advise consulting the  offical [API document](https://www.okx.com/docs-v5/en/)
+
+- User with RestAPI can configure parameter `flag` in `example.py` in  to choose to access to real trading or demo trading 
+
+- User with WebSocketAPI can ucomment the corresponding `url`  to choose to access to real trading or demo trading 
+
+- Rest API support request by http2, you can refer to http2_example  
+
+- If you face any questions when using `WebSocketAPI`,you can consult related link
+
+  - `asyncio`、`websockets` document/`github`：
+
+    ```python 
+    https://docs.python.org/3/library/asyncio-dev.html
+    https://websockets.readthedocs.io/en/stable/intro.html
+    https://github.com/aaugustin/websockets
+    ```
+
+  - About `code=1006`：
+
+    ```python 
+    https://github.com/Rapptz/discord.py/issues/1996
+    https://github.com/aaugustin/websockets/issues/587
+    ```
+
+    
+