After WeChat blacked out, both parties still exist in each other's WeChat address book. The friendship between two people has not actually been lifted, and the two sides can actually transmit information. But the message sent by the hacked person will be rejected by the hacked person, and the message has been sent on the chat page of the hacked person. But the message was rejected by the other party, but the blackmailer did not receive any information.
After being blacked out by others, you can't add blacked out people through the address book. If you need to add, you need to free the blacked-out person from the blacklist before you can continue to add friends, so if someone you don't want to see can be blacked out, as long as you don't remove it after blacking out, this person can't add you as a friend.