Wechat deletes or blackmails friends. When their WeChat avatars change, friends who have been deleted or blacked out can still see the changes of their avatars for the following reasons:

1. The related information of WeChat users is saved on the network server, and the information read by opening WeChat is the content of the server.

2. At present, WeChat does not support deleting the other party, and the other party's friend list has also been emptied, so the other party's avatar can still be seen.