China Jingyan Mining was founded at the end of the Warring States Period. According to Jinchangqu "Huayang National Records? The Records of Shu records: "After the Zhou Dynasty, King Xiaowen of Qin (Zhao Haoqi, King of Qin) took Li Bing as the guardian of Shu (about 256 BC-25 BC1). Ice can know astronomy and geography ... and water veins pass through salt wells in Guangdu (now Shuangliu County), so Shu is in good health. "Bing is a famous water conservancy expert during the Warring States Period. Perhaps he discovered the underground brine in Chengdu Plain when he led the Bashu people to cut mountains and transport soil and build Dujiangyan Project. Huayang country? Shu Zhi also said, "Nan 'an County (now Leshan City, Sichuan Province) ..... ruled the Yijiang society. The county irrigates the famous beaches ... Second, salt irrigation, with Li Bingping. "It is clearly pointed out that Li Bing once leveled the salt flats formed by underground brine outflow. At that time, after Qin occupied Shu, a large number of immigrants brought all kinds of advanced technologies from other places, including the technology of drilling wells in the Central Plains. In addition, the rapid increase of population in Sichuan will inevitably lead to the urgent demand for more salt supply. In this situation, Li Bing pioneered the digging of salt wells, which not only enriched the country and benefited the people, but also promoted the development of drilling technology. His great achievements can be said to be no less than his contribution to water conservancy.