Readers who come to public libraries in Beijing can apply for the one-card card of Beijing public library with their ID cards, which is common to all libraries. The deposits are: Grade B: 50 yuan, Grade C: 100 Yuan, Grade D: 200 yuan, and Grade E: 500 yuan. Class B cards can borrow 3 books and periodicals 14 days, and Class C, D and E cards can borrow 5 books and periodicals for 28 days. Class B, C, D and E cards can borrow two CDs from the Capital Library for one week, and cannot be renewed.