If the library wants to return the card, it must bring all its favorite books, ID cards and library cards to the library to go through the formalities of returning the card. The books you like should be clean and tidy, and there should be no damage, otherwise you will have to pay a certain loss fee. In the current situation of repeated epidemics, every library has an appointment system and timetable, and there are personnel restrictions. Therefore, to return the card, you need to make an appointment with the library staff in advance to avoid a trip in vain.