The doctrine of the mean refers to the moral standards of Confucianism, which have been followed and respected by Confucian scholars throughout the ages. The doctrine of the mean is also called "serving China" and "combining the old with the new". It means to treat people and things in a fair and peaceful manner, according to the time, events and local conditions. The theoretical root of Confucianism comes from human nature. From "The Analects of Confucius Yongye": "The golden mean is also a virtue, and it is extremely good."

The summary of peace: "Courage, constancy, neutralization and total energy." The Doctrine of the Mean, one of the Confucian classics, was originally the thirty-first chapter of the Book of Rites. The writing was written between the end of the Warring States and the Western Han Dynasty, and the exact author is still inconclusive. On the one hand, it was written by Kong Ji (The Doctrine of the Mean written by Zisi), and on the other hand, it was written by scholars in the Qin Dynasty or the Han Dynasty.

Confucian scholars in the Song Dynasty respected the golden mean and took it out of the Book of Rites as an independent work, while Zhu Ze co-edited it with The Analects of Confucius, Mencius and Daxue into four books.

The Doctrine of the Mean is an article on Confucian human nature cultivation. Originally the 31st Book of Rites, it is said that it was written by Kong Ji, the grandson of Confucius, and it is a classic work of Confucianism. Zhu in the Southern Song Dynasty was highly respected by Cheng Hao and Cheng Yi in the Northern Song Dynasty, and he wrote Notes on the Mean, which is called the Four Books together with Daxue, Analects of Confucius and Mencius.

After the Song and Yuan Dynasties, Confucian classics, represented by The Doctrine of the Mean, became the textbooks designated by the school and the required books for the official imperial examinations, which had a great influence on the ancient education in China. The five attainments, three dads, cautious independence and sincerity in The Doctrine of the Mean still have an important influence on people's behavior and human nature cultivation.