Certain features can be seen in the internet application behavior by minors，the main force for using internet，which is “keeping up with the latest fashion and chasing hot apps”. How and what features wechat，a nationwide hot app in the recent 2 years，is used by minors？This article is based on the data about wechat use from the 7^th survey on internet use by minors in 2013. It describes and analyzes wechat use by minors in China. Comparing the data about microblog use in the 2012 survey，it emerges an apparent trend that wechat is replacing microblog among minors.