I can't. I don't need money, but I'm not allowed to bring books with me unless it's notes, homework, printed articles, and reading idle books for academic research.

If you want to take the self-study exam, you have to go to the libraries of major universities, but you usually need a student ID card or a library card to enter. However, classrooms in teaching buildings are generally free, so as long as no one is in class, just go in.