Why 'suu'?

When executing 'su' command in the terminal, the terminal will always say 'Operation not permitted'.

The 'su' file is inaccessable even you set it to 777.(THE MAGISK APP ITSELF CANNOT GET ROOT ACCESS TOO).

but you can still use 'magisk su' command to get root access.That's weird, huh?

Well. Unfortunately, vivo had done some "MAGICAL" restrictions inside their official ROMs (even the official debug build roms can't execute 'su' directly ,WTF vivo!) ,you can't execute ANYTHING WHICH IS NAMED 'su' directly.

But actually you can bypass those restrictions by simply rename 'su' to 'suu' and enjoy root access XD

(tested on my own vivo device)