QQ: It is an instant messaging software developed by Tencent based on the Internet. It supports online chat, video call, point-to-point breakpoint continuous transmission, * * * * file sharing, network hard disk, customized panel, QQ mailbox and other functions, and can be connected to various communication terminals.

Wechat: It is a free application launched by Tencent on 20 1 1, providing instant messaging service for intelligent terminals. Support fast sending of free voice messages, videos, pictures and texts across communication operators and operating systems.

YY: It belongs to YY Entertainment Division of Happy Times and is the founder of domestic online video live broadcast industry.