Zhejiang Sanmei Chemical Ind. Co., Ltd. Established in 2001, located in the New Materials Industrial Park of Wuyi County, it is a listed company mainly engaged in research and development, production, and sales of fluorine-containing chemical products (stock code: 603379). It has 8 wholly-owned subsidiaries, 2 equity participating companies, and 1 Sino foreign joint venture company, with 52 invention patents and 69 registered trademarks both domestically and internationally. It has led the formulation of more than 10 national, industry, and group standards, and has been selected as one of the top 500 chemical enterprises in China for several consecutive years, earning it the title of "evergreen tree of the top 500 chemical enterprises in China". Sanmei is committed to the research and production of fluorinated refrigerants, foaming agents, high-purity electronic chemicals, fluorinated lithium battery materials, and high-performance polymers. Among them, a series of products such as anhydrous hydrogen fluoride, refrigerants, foaming agents, etc. have a production and sales volume that ranks among the top in the world. At present, the company has customers in over 100 countries and regions, and is also a refrigerant supplier for well-known domestic and foreign automobile and air conditioning production enterprises such as Gree, Midea, Toyota, Geely, etc.