Mencius was proud to be the successor of Confucius all his life. By studying with a hanger-on of an aristocrat of Zisi (The grandson of Confucius), Mencius began to study the knowledge of Confucius in his youth. Mencius was well versed in the six classics, which served as the beginning for him to accept Confucius' knowledge and it also laid a solid foundation for him to inherit Confucius thoughts in his later years. Mencius, in his middle age, followed the example of Confucius and traveled to various countries in search of opportunities to practice his teaching and political ideals. In his later years, Mencius retired from Qi and Liang (two states in the Warring States period of China), followed the example of Confucius and devoted himself to teaching and sorting out classics and documents, and wrote seven chapters of Mengzi with disciples Wanzhang and others in preface to Poems and Books. This “seven chapters” has been acknowledged by the later generations as the classical interpretation of the academic thoughts of Confucius.