Li Bingchu, the prefect of Qin and Shu counties, built a weir, and Dujiangyan was named "Kuishan". This is because Leiyushan next to Dujiangyan was called "Kuishan" before Qin and Han Dynasties, and people living around Dujiangyan at that time mainly called the weir "Gui", so Dujiangyan was called "Kuishan".

During the Shu and Han Dynasties in the Three Kingdoms, Du 'an County was established in Dujiangyan, which was named "Du 'an Weir". At the same time, it is also called "golden dike", which highlights the water diversion function of fish mouth and uses dike instead of weir as its name.

Historical significance

The establishment of Dujiangyan ushered in a new era in the history of ancient water conservancy in China. On the premise of not destroying natural resources and making full use of natural resources to serve mankind, we will turn harm into benefit and make people, land and water highly coordinated and unified. It is by far the only great "ecological project" in the world.

It initiated a new era in the history of ancient water conservancy in China, marked a new stage in the history of water conservancy in China and wrote a glorious chapter in the history of water conservancy in the world. Dujiangyan Water Conservancy Project is the crystallization of ancient people's wisdom in China, an epoch-making masterpiece of China culture and the only miracle of ancient water conservancy projects.

Irrigation systems in ancient Egypt and Babylon, Lingqu in Zheng Guoqu, China, and Guangxi in Shaanxi, China, which were built almost at the same time, were lost or failed due to the change of the ocean and the passage of time. Only Dujiangyan is unique and has a long history of construction, which still nourishes the fertile soil of the land of abundance.