WeChat (微信)  was put into market in January 21, 2011. Because of its attractive functions(功能),low cost and convenience, it becomes a hot free software. You can see people around you using WeChat to talk with their friends now. They are especially students in high schools and universities. The other users are workers. The age range is from ten to sixty years old. Most people may become WeChat users.
WeChat supports Wi-Fi and 3G network. It can enjoy group chat up to 20 people. What's more, WeChat can search people around you. It also supports to send video. You can share the wonderful pictures with other people at any time. It can share your messages to the world and make new friends. WeChat not only can keep your pictures and texts in a way, but also can help you to catch your messages. WeChat makes two people "talk" with each other in different places and at different time. People believe that there will be many other functions created in the future.
The cost of WeChat is very low. It costs nothing to own WeChat if you have a phone such as Nokia
Motorola, Lenovo. However, it costs web traffic (流量) to send and receive messages. It is enough to spend ten yuan on your web traffic for a month. The low cost is one of the main reasons why WeChat becomes popular.
小题1:WeChat was created after January 21, 2011.
小题2:Most people may become WeChat users except the old people.
小题3:WeChat won't be created with other functions in the future.
小题4:You can use WeChat to talk with twenty people at the same time by smart phone.
小题5:The cost of WeChat is very low, but the web traffic cost is very high.