I'm afraid I won't get into college and want to give a gift.
Since it is a university, we should give gifts before and after the exam, visit their home before the exam, invite the teacher to dinner after the exam, and then send some historical red wine and of course give the teacher a gift package. The minimum is 2000. After all, it's a university. You can't let the teachers think you are too shabby. Be generous in giving gifts to college teachers.