Those who take the postgraduate entrance examination are generally in the library, so they can't get in without a card. The second teacher can also attend self-study, and the display screen of the main hall will show whether there are any free classrooms. If you want to find an atmosphere, see if it is possible to meet some research friends at Linda University first, and then ask them to help you find a way to take you into the library. There is a bookstore selling postgraduate entrance examination materials in the education supermarket, next to Chen Guang stationery store, and there is an old man who often sells pirated books downstairs in the library. He will come at seven or eight in the evening.