The solution is as follows:

Log in the correct QQ account and password on the mobile phone, and you can log in successfully;

After logging in successfully, we click "Settings" to select-find the option function of "Personalized Signature";

After clicking Select, we can modify what we need to fill in. After filling in successfully, we can choose "OK" in the upper right corner.

QQ:

Tencent QQ (QQ for short) is an Internet-based instant messaging (IM) software developed by Tencent. Tencent QQ supports online chat, video call, point-to-point breakpoint continuation, * * * file sharing, network hard disk, custom panel, QQ mailbox and other functions, and can connect various communication terminals. Its symbol is a little penguin wearing a red scarf. ? QQ is an instant messaging software launched by Tencent on 1999. It can not only chat and make friends on various communication terminals, but also make free QQ video calls and QQ voice calls, or send and receive important files anytime and anywhere. You can also communicate with mobile communication terminals, IP telephone networks, wireless paging and other communication methods, share screens, watch movies and so on. These powerful and practical functions make QQ more than just a simple network virtual pager.

At present, QQ has covered many mainstream platforms such as Microsoft Windows, OS X, Android, iOS and Windows Phone.