At the end of the Qin Dynasty (about 256 BC ~ 25 BC1year), Li Bing was in charge of the construction of Dujiangyan, an early irrigation project in China, at the exit of Minjiang River in Dujiangyan City, Sichuan Province, thus making the Chengdu Plain rich.
According to the Records of Huayang National Records, Li Bing once installed a water gauge of a stone man in Dujiangyan, which was an early water level observation facility in China. He also dug beaches and dredged waterways in today's Yibin and Leshan, built irrigation and shipping projects such as Wenjing River (now Xihe in Chongqing County), Mubai River (now Nanhe in Qionglai), Luoshui River (now Shiting River) and Mianshui River (now Mianyuan River), and also built cable bridges and opened salt wells.
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Li Bing was an outstanding water conservancy engineer and the designer and organizer of Dujiangyan during the Warring States Period. Dujiangyan, which is famous at home and abroad, is located in the middle reaches of Minjiang River in central Sichuan Province. The whole project consists of three main projects: diversion weir, flying sand weir and treasure bottle mouth.
Its large scale, suitable location and reasonable layout have three functions of flood control, irrigation and shipping, and it is also a rare miracle in the history of water conservancy projects in the world. For more than two thousand years, it has been playing a huge role in irrigation and drainage, ensuring local agricultural production.
There is no written record of Li Bing's time guarding Shu, which is about 30 years from Zhao Haoqi in Qin Dynasty to Xiaowang in Qin Dynasty (277-250 BC).
During his tenure as Shu Shou, Li Bing also contributed to other economic construction in Shu. Li Bing "knows the water vein, Tongguangdu (now Shuangliu, Chengdu) salt well, so Shu is full of health." Prior to this, salt mining in Sichuan was in a very primitive state, relying on natural salt springs and salt stones. Li Bing created the method of cooking salt with brine for sinking, which ended the original situation of salt making in Bashu.
This is also the earliest record of digging wells and boiling salt in China history books. Li Bing also built seven bridges in Chengdu: "Zhiximen Yongjiang Bridge; Shi Niu Gate in the southwest is called Chengqiao, and the stone rhinoceros is hidden in the deep; River bridge in the south of the city; Wan Li Bridge in Liu Yue, Du Nan; The west is called Yili Bridge, and the top is called Ruxiang Bridge. The bridge breaks from the swift bridge to the west, which is called Changsheng Bridge. There is Yongping Bridge to the west of Yongjiang River. " These seven bridges are conveniences on the canal.
Baidu Encyclopedia-Li Bing