I want to know why the QQ address displayed on my computer doesn't match the actual geographical location.

Report the error message, reset your province and city, and then log in to QQ again. There are two reasons: one is that QQ's ip address database is updated incorrectly, that is to say, the geographical location represented by the ip you actually surf the Internet represents another address in QQ's IP address database, and the IP address database can't be 100% correct, which should have little impact on your surfing the Internet. Another reason is that the IP assigned to you by your ISP has changed, which has nothing to do with you. For them, the IP address in their hands is the same, and it is the same for everyone, especially ADSL users, who change their numbers every time they dial. Therefore, the geographical location of the IP they gave you may be from other places, which leads to the geographical location displayed on QQ inconsistent with your actual situation. If you want to change this situation, you must consult your Internet provider (ISP), or you can find a network proxy and manually configure your IP to access the Internet.