1, there are not necessarily three private books, but three must be private. 2. Three books mainly refer to completely private universities (Blue Sky University) and all independent colleges (state-owned universities cooperate with social forces, such as Jincheng College of Sichuan University).

However, some students in some private colleges are studying in two middle schools.

3. As long as they pass the formal college entrance examination, their diplomas are the same as those of state-owned universities. The state also recognizes that the diplomas of people in private universities are not recognized, just like those of key universities and two universities, but the employers of graduation certificates of key universities feel better.