Operation method
Log in to the QQ computer client, click the menu in the lower left corner - select "Tools" - "Friend Manager" - "Retrieve deleted friends".
In the previous step, a page "QQ Restore System" - "Restore QQ Friends" will pop up.
Enter the page and select the options to restore according to the deleted time period.
One second after clicking "Apply for restoration", the deleted friend will be restored to the original location immediately. The restored QQ friend will receive a prompt, but no matter how he chooses, his QQ number will be in your QQ list. You'd better send a message to explain the reason to avoid misunderstanding.