How to make friends when QQ has a heart-to-heart talk and let others enter his space little by little?

For a general smart phone, open the input box with an @ symbol. Click on it, and a friend list will appear. Just select the person you want to @. If you don't have this option, just enter @ yourself and the nickname of the person you want to @. If there are spaces in each other's nicknames, none of them can be omitted. After the whole nickname is lost, you have to put a space, that's all.