1, first seen in Mencius with all my heart: a gentleman has three pleasures, but the king of the world does not exist. Parents exist, brothers have no reason, one is happy; Yang is worthy of the sky, regardless of people, but also happy; It is three pleasures to be educated by talents in the world.

2. Mencius was listed as the "Four Books" by Zhu in the Southern Song Dynasty (the other three books were Daxue, The Doctrine of the Mean and The Analects of Confucius). In the mid-Warring States period, Mencius and his disciples Zhang Wan, Gong Sunchou and others. The earliest inscription in Zhao Qi's "Mencius" reads: "This book was also written by Mencius, so it is called Mencius".