1. Universities in Hong Kong have no access control. Basically, you can go at any time, but feel the learning atmosphere. Of course, you have to go with the students. . So it is best to be from 8 am to 7 pm every day. They are still in class. It is also open on weekends, but there are fewer students.

That depends on how much you have to suffer from college. There are eight government-funded universities in Hong Kong, but I think if you really want to visit them, it is enough to go to HKU, CUHK, HKUST, City University and Polytechnic. It's ok to take a quick look at flowers a day.

The suggested route is: CUHK- CityU-Polytechnic-HKUST. To be honest, HKUST is far away, so you can choose between them.