The educational method is to teach students in accordance with their aptitude and set an example. There are 3,000 disciples of Confucius and 72 sages, each with his own merits. In The Analects of Confucius, Ziyou asked about filial piety, and Xia Zi asked about filial piety. Zhu's Collection of Notes quoted Song as saying: "Ziyou can be promoted or lost, but it can be more or less gentle, each of which varies according to its superior materials and each has its own losses." Confucius himself has the idea of reviving the king and helping the people, and the Analects of Confucius, which records his words and deeds, has been passed down from generation to generation, that is, teaching by example; He led his disciples around the world and lobbied the princes with his own ideas, which were also deeply touched by him.