Fix doc

PPOCRLabel/README.md

@@ -54,7 +54,8 @@ PPOCRLabel can be started in two ways: whl package and Python script. The whl pa
 
 ```bash
 pip install PPOCRLabel  # install
-PPOCRLabel  # run
+PPOCRLabel  # [Normal mode] for [detection + recognition] labeling
+PPOCRLabel --kie True # [KIE mode] for [detection + recognition + keyword extraction] labeling
 ```
 
 > If you getting this error `OSError: [WinError 126] The specified module could not be found` when you install shapely on windows. Please try to download Shapely whl file using http://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely.
@@ -67,7 +68,8 @@ PPOCRLabel  # run
 ```bash
 pip3 install PPOCRLabel
 pip3 install trash-cli
-PPOCRLabel
+PPOCRLabel  # [Normal mode] for [detection + recognition] labeling
+PPOCRLabel --kie True # [KIE mode] for [detection + recognition + keyword extraction] labeling
 ```
 
 #### MacOS

PPOCRLabel/README_ch.md

@@ -57,7 +57,8 @@ PPOCRLabel可通过whl包与Python脚本两种方式启动，whl包形式启动
 
 ```bash
 pip install PPOCRLabel  # 安装
-PPOCRLabel --lang ch  # 运行
+PPOCRLabel --lang ch  # 启动【普通模式】，用于打【检测+识别】场景的标签
+PPOCRLabel --lang ch --kie True  # 启动 【KIE 模式】，用于打【检测+识别+关键字提取】场景的标签
 ```
 > 注意：通过whl包安装PPOCRLabel会自动下载 `paddleocr` whl包，其中shapely依赖可能会出现 `[winRrror 126] 找不到指定模块的问题。` 的错误，建议从[这里](https://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely)下载并安装
 ##### Ubuntu Linux
@@ -65,7 +66,8 @@ PPOCRLabel --lang ch  # 运行
 ```bash
 pip3 install PPOCRLabel
 pip3 install trash-cli
-PPOCRLabel --lang ch
+PPOCRLabel --lang ch  # 启动【普通模式】，用于打【检测+识别】场景的标签
+PPOCRLabel --lang ch --kie True  # 启动 【KIE 模式】，用于打【检测+识别+关键字提取】场景的标签
 ```
 
 ##### MacOS