Zhou Li is a book that records the ancient political system of China.
Yili is the most complete book to preserve the ancient etiquette in China. It is said that Confucius once asked Laozi for etiquette.
The Book of Rites is a book that clarifies the function and significance of rites.
Zhou Li, Yi Li and Li Ji, collectively known as the Three Rites, are the confluence of etiquette systems and etiquette theories in ancient society. It is the system of slave society in China and the moral standard of slave society and feudal society.