If suddenly you can’t send out friend requests it’s because our server has temporarily blocked your account from doing so. This is a security precaution to keep away spammers from QQ Internationals: we have surely received complaints against your account for inappropriate activities such as sending contact requests too frequently or posting unsolicited advertisements.
Please don’t worry: you should be able to add contacts again after 24 hours.
If such inappropriate activities continue to occur, your ID will be locked out for a longer period of time. Please read our Terms of Service and familiarize yourself with our rules and regulations.