Hello, Landlord, 1 and library card are both 20 yuan+deposit fees (50, 100, 150 yuan optional). If it is a library card for the reading room in 1 building, you don't need an ID card, but there are fewer books (for children); The library card of the reading room on the second floor requires an ID card (or a military ID card, passport, etc.). How many books to borrow depends on the deposit when you borrow the card. 50 yuan can borrow at most 1 book, 100 yuan for 2 books and 150 yuan for 3 books at a time. The loan period of each book is 15 days, and you have to pay 1 gross overdue fee for each book exceeding 1 day. You can bring notebooks and stationery into the reading room, and other things should be put in the locker outside. The study rooms on the fifth and seventh floors are all available. 4. You need another card to go to the study room. There are weekend cards and regular cards. The weekend card can only be used on weekends, 8 weeks in 20 yuan; Ordinary cards can be used from Tuesday to Sunday. 20 yuan/month, 50 yuan doesn't have a good ID card for three months, so you can borrow a library card from your brother and sister.