Just ask the administrator there. If I don't tell you, connect with Tencent mobile phone housekeeper. After installing and logging in, find the function key of free wifi in the advanced toolbar on the main page. After entering, Tencent Mobile Manager will show you the free network you can connect to (the green little key icon is it). We can choose the network connection manually. Of course, you can also directly connect to wifi with one click, and Tencent Mobile Manager will automatically match the most suitable wireless for us.