In recent years, the number of postgraduate students has been increasing rapidly, and it is difficult for Zhang Yu to shoot postgraduate videos. After reading my answer, the penultimate sentence is the key point. The huge amount of calculation puts higher demands on students and they must do the problems themselves. You open the small V postgraduate entrance examination of Weixin Shipping College, and you can get it directly after you go in. I still hope that everyone can help more people and wish you success in the postgraduate entrance examination.