Generally, class ends at nine o'clock, and evening self-study means that students arrange some time for concentrated self-study and homework in the evening besides normal classes at school. University study is mainly self-study, that is, a way of learning in which you choose your own teaching materials and counseling materials and arrange your own study plan in your spare time. Mainly senior three students have evening self-study. For example, reading early before class is called self-study early, and self-study can be arranged in the afternoon after lunch and in the evening.