This is necessary. Before going to graduate school, we need to know our future research direction. At this time, in addition to consulting teachers and brothers and sisters, the most direct and effective way is to read the tutor's paper. Because the research direction of the tutor will not change much, the topics you need to study after entering the research group are likely to be similar. Of course, you don't need to look too carefully at first, just know a general idea, which can also help you get into the state early.