You can borrow books by card, but it is not clear whether it is free. Citizen card (Changzhou social security citizen card) is an electronic real-name ic (integrated circuit) card issued by Changzhou municipal government for handling personal social affairs and enjoying social services. The main application fields of citizen card include the following three aspects: First, government public services. Citizen card has social security functions such as pension, medical care, unemployment, work injury and maternity insurance. In the future, other government services will be gradually increased, such as residents' health records, provident fund inquiries, and subsistence allowances. The second is the function of electronic wallet. Citizen cards can be used on public transport. In the future, it will be extended to taxi, telephone bill, garden tourism, catering, library, parking and many other fields. The third is the application of financial services. Citizen card has the function of ordinary bank debit card, and can complete services such as deposit and withdrawal, consumption and transfer. After the citizen card is issued, it will gradually replace the medical insurance card and become an essential IC card for citizens to enjoy social public services.