What is better for family and friends to write in the address book?

Whatever you want to call it, you can add an A to the person you often look for.

According to the initials of the other party's name and the pinyin of the surname, the concealment can be enhanced.

If there are duplicate names, you can briefly describe them.

The direct remarks about father, brother and mother can be changed to BB, DD and MM to prevent bad people.

A friend's name can be added with an initial to make it easy to find.

You can use your usual nickname as long as you know who it is.

You can add your own ideas and name others with words you just know, which is safest.