How to set the blacklist of Redmi?

MIUI used by red rice mobile phone is a perfect Android system, including blacklist and whitelist functions. You don't need to download third-party software, just use the built-in tools in the system.

First find the "System and Security" folder on the desktop, find the "anti-harassment" function, find the blacklist column, find the add number at the bottom of the page, and then manually click Add Blacklist.