There are indeed many people of one age. There are two campuses in Hengzhong, with 2000+ freshmen and 0/000+review students, and the total number of science students is more than 3000. There should be more than 1000 people in liberal arts. If the class size is large, there will be about 70 freshmen in one class, 12 experimental class, and even more ordinary classes. . . Arts and sciences add up to dozens of classes. . .

Then most students of Tsinghua Peking University are fresh graduates. I know that there are only two or three review students in Tsinghua Peking University. . . Liberal arts is not clear