School uniforms are personal belongings. It is not illegal to sign the school uniform just for graduation and to cherish the friendship between yourself and your classmates and teachers, and it is not harmful to society.

I usually ask my best friend to sign first, and my best friend will definitely sign in the most conspicuous place. For example, the name in the middle position in front is generally a friend who is playing well, and other friends who are not very good will sign it casually. This is just a school uniform signature position, and it won't have any special significance.