2. It is said that they are called "Four Books" (also called "Four Books") because of the four representatives of early Confucianism, namely Zeng Shen, Zi Si, Confucius and Mencius. After that, the four books were listed as the scope of imperial examinations in previous dynasties, thus creating the unique position of the four books. Even after the Song Dynasty, the Four Books had surpassed the Five Classics.