"One form", "two forms" and "three forms" are the admission of one, two and three books, which are usually divided into three categories.

The first type of undergraduate usually refers to the national key universities, the undergraduate colleges that entered the 2 1 1 project and the provincial key undergraduate colleges designated by the provinces, commonly known as a book, and the marked scores are called a line, also called a key line.

The second category is an ordinary undergraduate course for national enrollment, which is one grade lower than the first category, commonly known as two books, and is admitted in the second batch.

The third type of undergraduate course refers to local undergraduate courses, and there are also some independent colleges under key universities, mainly for enrollment in the province. It is the lowest undergraduate college, most of which are upgraded from the original college, commonly known as the three colleges.