The entrance examination for graduate students majoring in vision generally takes a design sketch and so on, and there is no need to run a training class. My personal suggestion and experience is that you should go to that school and find a basic sketch teacher who teaches basic sketch in this school to buy a sketch book. Generally, this teacher is a questioner or an auditor. Then practice this style by yourself, and it is best to make a breakthrough and innovation in this style. I'm sure you can get high marks! !