The postgraduate entrance examination class is divided into four stages: foundation, reinforcement, sprint and thesis. Each stage is independent of each other. The math you mentioned is the most difficult for a person to take the postgraduate entrance examination, and the scope of the examination is also the largest, including the number two and the number three. The online course of Tiandao that I took before, and the third math course I took, were all talked together. The teacher will remind you when you talk about the part you didn't take. You can listen to it from beginning to end. The postgraduate classes are all like this. The strengthening stage is the second round, and we all talk together. You just don't have to take exams or listen. The remedial classes also want to maximize the benefits. I see. You can have a look again.