add bibtex cite code

README.md

-# Wechaty [![NPM Version](https://img.shields.io/npm/v/wechaty?color=brightgreen)](https://www.npmjs.com/package/wechaty) [![NPM](https://github.com/wechaty/wechaty/workflows/NPM/badge.svg)](https://github.com/wechaty/wechaty/actions?query=workflow%3ANPM) [![Docker](https://github.com/wechaty/wechaty/workflows/Docker/badge.svg)](https://github.com/wechaty/wechaty/actions?query=workflow%3ADocker)
+ Wechaty [![NPM Version](https://img.shields.io/npm/v/wechaty?color=brightgreen)](https://www.npmjs.com/package/wechaty) [![NPM](https://github.com/wechaty/wechaty/workflows/NPM/badge.svg)](https://github.com/wechaty/wechaty/actions?query=workflow%3ANPM) [![Docker](https://github.com/wechaty/wechaty/workflows/Docker/badge.svg)](https://github.com/wechaty/wechaty/actions?query=workflow%3ADocker)
 
 [![Wechaty](https://wechaty.js.org/img/wechaty-logo.svg)](https://wechaty.js.org)
 
@@ -476,6 +476,21 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
 
 [![Profile of Huan LI (李卓桓) on StackOverflow](https://stackoverflow.com/users/flair/1123955.png)](https://stackoverflow.com/users/1123955/huan)
 
+## Cite Wechaty
+
+To cite this project in publications:
+
+```bibtex
+@misc{wechaty,
+  author = {Huan LI, Jiarui LI},
+  title = {Wechaty: Conversational SDK for Chatbot Makers},
+  year = {2016},
+  publisher = {GitHub},
+  journal = {GitHub Repository},
+  howpublished = {\url{https://github.com/wechaty/wechaty}},
+}
+```
+
 ## :email: Copyright & License
 
 - Code & Docs © 2016-now Huan, Rui, and Wechaty Community Contributors