The state compiles, tests and uses textbooks in a unified way. The textbooks of three subjects refer to ideological and political (morality and rule of law), Chinese and history. They are compiled, reviewed and used by the state, which is a major deployment of education by the CPC Central Committee in the new era. The textbook of "Three Subjects" is the core textbook to implement the fundamental task of moral education and guide students to establish a correct world outlook, outlook on life and values in the new era.