The password of wireless network WiFi is on each entrance workbench, and there is a blue paper sign on the desk with the password number written on it.
You can also go to the computer room on the fourth floor for free internet access. There is a machine that can take the number at the door, similar to the queue machine in the bank. After getting the number, look at the big screen at the door to remind you which number can go to which machine. Generally, there are many people, so we need to wait. Two hours is a cycle, and it needs to be renumbered after completion.