One card is divided into five grades. Ordinary readers can set a C level. The functions of Class C are reading Chinese ordinary books, newspapers and borrowing Chinese ordinary books and periodicals. The total number of books borrowed is 5, with a borrowing period of 4 weeks and a renewal of 2 weeks. Deposit 100 yuan, handling fee and borrowing fee can be used for two years. After that, you need to verify 10 yuan every year. This library card can be used in almost all public libraries in Beijing, except the National Library.