To put it simply, it takes 12 minutes to take the school bus from the south campus and the Haiyin Bridge to the north campus, and it takes more than 20 minutes to slow down.
The second question is that all the students in the North Campus are studying medicine. In fact, before the North Campus merged into Sun Yat-sen University, it was Sun Yat-sen Medical University. Finance is, of course, in the south campus.