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Most salt lakes of Chaidamu circular economy pilot area in Qinghai Province are chloride-type lakes, and many chlorine-contained by-products will be formed during the developing process. How to utilize and transform these by-products has an important significance for the chlorine balance in industry chain of salt lake area. The industrial metabolism process of chlorine element is analyzed from the main planed products in Chaidamu circular economy pilot area master plan. Two main problems that affect the utilization of chlorine element are chlorine element balance and potential pollution to the salt lake caused by calcium chloride. Three transforming and converting approaches are put forward, which are immobilization process that converts chlorine to solid products, transformation process that transforms chlorine to organic products and clean storage of calcium chlorine. If the above approaches can be put into practice, the balance of chlorine element will be achieved in the pilot area. [ABSTRACT FROM AUTHOR]