Most of the time and knowledge in the university depends on self-study, and the university is to cultivate students' self-study ability. The teacher only talks about the general scope, but only takes you to get started and cultivate yourself. Don't rely too much on the teacher. The teacher can't know everything. But students have to learn a lot of knowledge, and it is impossible in college without self-study. I suggest you make your own study plan. Those with good ability can study in advance. You don't just have to study planning courses.