But you can also sneak in and sit down and leave when you see the inspectors coming.
The multifunctional study room inside is charged on a per-call basis. If you have a card, you can swipe it in one day 1.5 yuan.
If you don't have a card, you can temporarily go to 2 yuan once.
The multifunctional study room has air conditioning, power supply and network cable. You can bring your own laptop to surf the internet here.