Second floor. Reservation in advance: You can reserve seats for the next day after noon 12:00 every day, and the reservation must start at 6:30. Same-day appointment rule: You can make an appointment on the hour/half an hour after the current time. Position judgment: The system adopts Bluetooth position judgment. Please be sure to keep your mobile phone Bluetooth turned on in the campus network environment, and scan the code, sit in, temporarily leave, return and leave your seat in the public reading room.