University libraries can organize readers to choose books when purchasing high-quality books. During college, the class and the library organized this kind of activity together, providing covers and profiles, allowing readers to choose books, draw orthography next to their favorite books, and then buy books according to their popularity. There is also a slightly direct way, the book cover enters the campus and provides book samples (cover catalogue and several pages of sample books) for students to choose, which is more intuitive and effective.