docs(readme): add wechat qr codes

README.md

@@ -7,6 +7,15 @@
 - See this blog: [Why 🍺](https://datahonor.com/beer/blog/2024/04/15/about-beer/)
 
 
+## WeChat Group
+我们有一个小的微信群，欢迎加入一起讨论有趣的问题！
+<div style="display: flex;">
+  <img src="/asset/qr_code/ds_group.png" style="width: 30%" />
+  <img src="/asset/qr_code/mathew.png" style="width: 30%;" />
+</div>
+
+当群聊二维码失效时，可以先添加我的微信(微信号: `MathewShen`)，备注"beer"。
+
 ## License
 - Non-code: CC BY-NC-SA 4.0
   <p xmlns:cc="http://creativecommons.org/ns#" xmlns:dct="http://purl.org/dc/terms/"><a property="dct:title" rel="cc:attributionURL" href="https://github.com/shenxiangzhuang/beer">Beer</a> by <a rel="cc:attributionURL dct:creator" property="cc:attributionName" href="https://github.com/shenxiangzhuang">Xiangzhuang Shen</a> is licensed under <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY-NC-SA 4.0<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/sa.svg?ref=chooser-v1" alt=""></a></p>