There is a problem with the network connection or the network speed is too slow;

QQ software itself problems, lack of relevant documents or missing documents;

The official qq team is carrying out system maintenance, which will not affect the normal use, but qq personal data can not be modified, including qq avatar and personalized signature.

The solution is as follows:

If there is a network problem, you need to reconnect to the network and log in to QQ again.

If there is something wrong with the QQ software itself, you need to reinstall the QQ software;

If it is not for the above reasons, it is likely that the official QQ team is carrying out system maintenance, so you can go to QQ official website to check the relevant information, and all functions can be restored after the system maintenance.

The function introduction of Tencent QQ:

Support online chat, video chat and voice chat;

You can continue to transfer files at point-to-point breakpoints * * * Enjoy files;

Support network hard disk, custom panel, remote control, QQ mailbox, offline file transfer and other functions;

Can connect a variety of communication methods;

Support network favorites, send greeting cards, store files and other functions.