Steps to remove redundant administrators from MacOS High Sierra

I looked at a lot of documents, a more reliable address of two, but found that unlike mine, I did not use.
Also posted here, for the needs of the "toss the people" to see.

[a big foreign method] (https://medium.com/@ambroselittle/cant-delete-original-admin-user-on-macos-high-sierra-1d79fb438246)
[a method of official search] (https://support.apple.com/en-us/HT203513)

Explore your own attempts several times, found the following is valid, record, for reference only.

If you cannot click, you need to unlock the process, there is no separate comment.
If the current user cannot be deleted from the current login, you need to create a new Administrator account (search for it Yourself)

The steps are as follows:
Record delete MacBook Pro High Sierra Admin user

1. In the user group, uncheck "Manage this device", that is, from administrator to normal user
2. Right-click Advanced options to remove user ID, login shell, and personal directory
3. Save it, OK.
4. Repeat the 2nd step to see if the user ID is-2?
5. Cut out, should be able to delete it. If not, try to log out or restart, re-enter, the "-" number should be deleted.

Steps to remove redundant administrators from MacOS High Sierra