Accommodation is not clear, three apartments should be ok, my second apartment, the three apartments opposite are more complicated, and should be for off-campus students. Things inside the school are definitely cheaper and safer than those outside.

If you eat in the canteen, you must have a meal card, and cash is not supported. Only one or two canteens should be opened during the summer vacation. You can usually get a temporary meal card. I don't know if you can do it in the summer vacation. If possible, you can do it in Xueyuan Building (canteen name). But if you don't, you can go to the "black shop" on campus (it seems to be called the food street, but it's not because it's dark), but you're not sure whether you can open in the summer vacation.

Libraries must have documents, especially student ID cards. University of Technology doesn't have a library card, does it? They all use student ID cards. There are also main buildings such as Zheng Xin Building, Honglou Building and Zhi Zhi Building. You can teach yourself. These local people do not check their certificates, but they may check their certificates in summer, but they should not be too strict. The most reliable is the study room in the apartment. If you live in it, you can definitely enter it. Although I am at school, I know so much because I don't care about it.