The most accepted learning methods are: full-time full-time study, evening university, correspondence, and even early TV university. This has great autonomy for students: if you have enough energy and financial resources, you can choose full-time study and experience real college life; If you want to charge yourself while working, you can choose Night University. If you want to go to a famous university in other places, you can also study by correspondence without leaving home. So you can go directly to the exam without class.