The following are the regulations of Tsinghua University Library (general libraries are similar to this one):

1. Use my library card to enter the library. It is strictly forbidden to borrow someone else's library card to enter the library.

Smoking is forbidden in the library.

3. Keep the room clean and tidy: it is forbidden to bring food and drinks into the museum; Please don't drag the reading desk and chair at will.

4. Keep the room quiet: Please turn off the pager and mobile phone when entering the library; Please speak softly in the library so as not to affect others' reading.

5. Dress neatly and behave politely.

6. Please don't grab seats.

7. Take care of books and periodicals and all public property. Please don't smear, tear or hide books and periodicals.

I hope it helps. I hope to adopt it as a satisfactory answer.