Mencius is a Confucian classic written by Mencius and his disciples Zhang Wan and Gongsun Chou in the middle of the Warring States Period. The earliest inscription in Zhao Qi's "Mencius" reads: "This book was also written by Mencius, so it is called Mencius". Mencius was listed as "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).
According to legend, there are four other books of Mencius, which have been lost (this book of Mencius is a fake of Yao Shizhen in the Ming Dynasty). This book records the politics, education, philosophy, ethical thoughts and political activities of Mencius and his disciples. In ancient times, "Four Books" and "Five Classics" were mainly tested.