The contact blacklist can generally be found in privacy, and the specific operation method is as follows:

1. Open WeChat, and in my tab, click Settings.

2. In Settings, click Privacy Options.

3. After entering the privacy, click to view the blacklist of address book.

A blacklist is a small group of address books. Adding the phone number to the blacklist can prevent others from harassing themselves by calling. When the other party calls you, it will prompt "The number you dialed is power off" or "The number you dialed is busy", so you can't receive his call.