But at your request, I can only help you think of such a way.
Euphemism and dissuasion
1. He started singing again. He handed over a piece of paper, which read: classmate, please pay attention, there are still people reading nearby. Your singing is beautiful. I can't even listen to it, which affects reading. Please don't sing in the library. Signature: affected person. If you find a beautiful girl to pass it on, the effect will be better.
He started singing again, took him aside and said, dude, you know what? People talk about you behind your back. I heard several girls talking in the local area yesterday. Who often sings in the library in XXX class? Everyone has an opinion. Pay attention to the image, okay?
Discourage is ineffective.
Direct:
1, hello! You! I told you not to sing in the library. Can't you hear me? If you want to sing, please go out and sing! Speak loudly and confidently to such a person.
2. Persuade him not to listen, call the administrator to warn him, and ask him out directly if he doesn't listen.
Use the topic under discussion to express your thoughts.
A notice was posted in front of the library: recently, some students were found to be disobedient to the rules and regulations of the library, making a loud noise, humming songs and not caring for books. According to the relevant regulations of the school, if it is found three times, it will be forbidden to read and compensate for the losses. Signature: School Student Management Office