Shenzhen Changlong Technology Co., Ltd. was established in Shenzhen in 2003, which is one of the high-tech enterprises with excellent employees holdings of company share. We are focusing on environmental protection, which is environmental protection technology company, as well as integrated with R&D, design, manufacturing, sales and services.Our company is mainly engaged in water treatment chemicals, Poly aluminium chloride, Poly ferric sulfate, Ferrous Sulfate. Now we have 21 factories around in China, with 6 million tons products capacity. Mainly produced poly ferric sulfate, poly aluminum chloride, phosphorus removal agent, composite carbon source, defluorination agent, poly aluminum ferric sulfate, quick&hydrated lime. Many water treatment products, such as nano alkali, drying ferrous, complex breaking agent, etc. Most of our products are using for water and sewage treatment plants, environmental operation companies, leather plants, paper mills, PCB factories, also our products are applied for environmental government supervision, lab test and inspection and other relative industrial application. We have a professional R&D team and more than 1100 CMA certified third-party testing laboratories. For users with complex water samples, our company can provide free detection, diagnosis and analysis, and customize the optimal solution.