update screen shot message

Author: wj-Mcat

projects/chatbot/README.md

@@ -1,5 +1,24 @@
-## Python Wechaty
-
+# Chatbot
 [python-wechaty](https://github.com/wechaty/python-wechaty) is an unified conversational RPA SDK for chatbot maker. Developer at least use six lines code to create chatbot base on multi-ims, eg: wechat, wechat official account, dingtalk, lark, whatsapp, giter, and so on ...
 
-There are [chinese documents](https://wechaty.readthedocs.io/) and [english documents](http://wechaty.js.org/) for developers to create their own chatbots.
+There are [chinese documents](https://wechaty.readthedocs.io/) and [english documents](http://wechaty.js.org/) for developers to create their own chatbots.
+
+### Prerequisites
+
+```shell
+pip install -r projects/chatbot/requirements.txt
+```
+
+### How to run the script
+
+```python
+python projects/chatbot/bot.py
+```
+
+### Screenshot/GIF showing the sample use of the script
+
+The Run command script above is the best screenshot. 
+
+## *Author Name*
+
+[wj-Mcat](https://github.com/wj-Mcat), 吴京京, NLP Researcher, Chatbot Lover