Qq Security Center will unfreeze it safely and will not send back any message.

Hello, if your number encounters this situation, it is because there are illegal operations or illegal information in the use of QQ number, which affects the use of normal users. This situation requires you to log in to the number security service area to cancel.

Click Enter, enter the QQ and verification code needed to remove the protection mode, and then follow the prompts on the page to remove it step by step.

It may be because the network is busy or the network fluctuates.

It's also possible that the message you sent didn't conform to the rules. Please check the content of the short message you sent!