WeChat is a free application launched by Tencent on January 21 2011. It provides a free application for instant messaging service which supports cross-communication operators. The cross-operating system platform is fast and free to send through the network (requires a small amount of network Traffic voice video images and text as well as "shake" "drift" "circle of friends" "public platform" and "community" by sharing streaming media content and location-based social plugins "Voice