Don't have Telegram yet? Try it now!
http://single9.net/2018/01/node-js-%e8%88%87-socket-io-%e5%8d%b3%e6%99%82%e8%81%8a%e5%a4%a9%e5%ae%a4%e5%af%a6%e4%bd%9c%e4%ba%8c/
Node.js 與 Socket.io – 即時聊天室實作(二)