According to exploration, in the vast area of ​​more than 400 square kilometers in the east of Ningjin County, there are very rich salt mine resources. The salt layer is buried at a depth of about 2,600 meters, and the thickness of the salt layer is 100 to 300 meters. The predicted prospective reserves are more than 100 billion tons, and With good grade, it is a rare super-large rock salt deposit in the central and eastern regions of my country. Exploration data show that this salt mine is of calcium salt type, the average grade of sodium chloride can reach 92%, and calcium sulfate is less than 5%, which is very suitable for the raw material of salt chemical industry. The reserves of more than 40 square kilometers explored in the early stage reached 10 billion tons, which can be exploited for more than 600 years. Experts have demonstrated that Ningjin Salt Mine can develop 28 downstream products such as soda ash, ammonium chloride, edible vacuum salt, etc., which can drive the development of more than 30 related industries.