What is the routine of adding WeChat to people near qq?

Maybe it's fraud, promotion or trying to expand friends.

Adding a micro-signal to the QQ avatar is to let you add a WeChat friend, thus defrauding you or selling goods. Be careful not to add strangers' wechat to prevent being deceived.

No matter on QQ or WeChat, don't just add other people's friends and click on the links to prevent being hacked and cheated.