Hello, I'm a student of Computer Department of Grade 06 of Sun Yat-sen University. There is no rule to repair this thing at night. You can go to the teaching building or the library for self-study if you like. After sophomore year, you can choose two public elective courses in the whole school, mostly at night.

There is no fixed classroom. I'll show you my schedule. Those A404 and the like are the classrooms where classes are held, and each class is different.