There are no hard and fast rules. If you want to buy your own textbooks, you don't have to pay the textbook fees of colleges and universities. Also, books bought by schools are generally more authoritative, so they are usually handed in. So if you choose to buy your own books, I suggest you buy the same books as the supporting textbooks in the school, so that you can learn.

Colleges and universities:

Colleges and universities are collectively referred to as undergraduate colleges, junior colleges and higher vocational colleges, referred to as universities. ? Colleges and universities are mainly divided into ordinary colleges, vocational colleges and adult colleges. Colleges and universities are collectively referred to as universities, colleges, independent colleges, higher vocational and technical universities, higher vocational and technical colleges and junior colleges. From the level of education and training, including junior college, undergraduate, master and doctor.