The reason for the unsuccessful reservation of Changsha Library is that the reservation is full, so you can make an appointment at another time. Changsha Library provides WeChat official account to make an appointment in the real-name registration system. When making an appointment, you need to fill in the real name information in detail and ensure that the information is true and effective. The same valid certificate can only be reserved once on the same day. After the appointment is successful, you need to go through procedures such as temperature measurement and security check with the appointment code and appointment ID card.