What's the difference between sending messages by Fetion and sending short messages? Is it free to use computers and mobile phones? Only the traffic fee? Please write in more detail.

Well, Fetion is a mobile service, with software and open api, which is sent to mobile users' mobile phones for free. It can be sent directly to the mobile phone, which is also quite convenient. Most of our classes are mobile phones, so we usually inform them to send group letters directly. Now I am learning qq on the mobile, and I have opened my registration. We can register as long as we have an email, just like qq.