[Monotoko]

You would not use QQ these days, it would be Wechat instead which pretty much everyone online in China has. QQ died around 2013

[yorwba]

I wouldn't say that QQ is dead, I have definitely seen people use it on their laptops in class at uni. A number of classes also used QQ groups for announcements, Q&A, etc.

I agree that WeChat is more popular, though. Those who have both my QQ and WeChat contacts overwhelmingly go though WeChat.