Ideological and moral cultivation and legal basis, referred to as "Thought" and "Introduction to the Basic Principles of Marxism", referred to as "Ma Yuan" and "Outline of Modern and Contemporary History of China", referred to as "Outline of Modern and Contemporary History" and "Introduction to the Theoretical System of Mao Zedong Thought and Socialism with Chinese characteristics" and "Mao Zong" should be these four books.