The Book of Rites was not a "classic" originally, but a record made by Confucius when he later explained the Book of Rites. It is attached to the end of the Book of Rites and explains the meaning of each article in the Book of Rites. Eleven of the seventeen articles in the Book of Rites still have this system. Later, the length is getting longer and longer, and the connotation is getting richer and richer. It is an independent book. To put it simply, it is to compile Confucian articles on etiquette from the Warring States to the early Western Han Dynasty.

The word "Datong" first appeared in Zhuangzi Reconsideration. "Great Harmony" means being integrated with everything in the world, that is to say, "cultivating the mind" should be "forgetting the roots". The Book of Rites describes the ideal society of "Great Harmony". Although this thought was initiated by Confucius, it is actually a summary and development of social theories such as Confucianism, Taoism, Mohism and agriculture.

The word well-off comes from the Book of Songs: "The people are also hardworking, can be well-off, benefit China and embrace all directions". It means that ordinary people work all day and their best hope is to live a well-off life. "Well-off society" is systematically expounded in the Book of Rites, which has become an ideal social model after "Great Harmony".