微信是一种更快速的即时通讯工具，具有零资费、跨平台沟通、显示实时输入状态等功能，与传统的短信沟通方式相比，更灵活、智能，且节省资费。
用英语描述就是:
WeChat is a faster instant messaging tool， which has the functions of zero tariff， cross-platform communication， real-time input status display， etc. Compared with the traditional SMS communication method， WeChat is more flexible， intelligent and saves the tariff.
