Dujiangyan's Annual Repair System in Ancient Times:From Jianpengyan Inscription by Shu Defender Li Bing in Qin Dynasty

From the ancient documents, archaeological data unearthed in recent years and the engineering model of Dujiangyan itself, it can be inferred that the annual repair of Dujiangyan should have originated at the beginning of the construction of the weir, and basically formed in the Han Dynasty at the latest.One of the important reasons for Dujiangyan to maintain its youthful vitality from ancient times is that it has a set of continuous, perfect, extensive and profound annual repair system full of scientific and humanistic spirit. The ancient Dujiangyan annual repair system includes scientific and reasonable annual repair rules, conventionalized annual repair timing, a system of labor organizations, and a variety of sources of funding channels.Dujiangyan is not only the model of human sustainable development in the aspects of engineering and water civilization concept, but also a precious historical and cultural heritage for the world in organizational and institution.