Who is the most important figure in the history of the development of traditional etiquette culture in China?

Confucius is the most important figure in the history of the development of traditional etiquette culture in China.

China's traditional etiquette culture is rooted in the ancient way of production and life. Confucius injected the connotation of "virtue" and "benevolence and righteousness" into the traditional etiquette culture, which made the compulsion of external etiquette rules move towards the consciousness of internal moral belief. After the Song and Ming Dynasties, Confucian etiquette paid more attention to inner introspection and self-discipline, so the traditional Confucian etiquette culture emphasized individual moral realm and inner cultivation.