Why are friends' comments in qq space automatically deleted? How to solve this problem! ! !

Hello. In the protection of privacy and the right to use, you can't delete what you have for others. You can choose to let others delete it. If there is any misunderstanding and you say something you shouldn't say to your friend, you can say to your friend, "Sorry, the number was stolen a few days ago." Or the number is not on me. "This can also solve the contradiction.