Shenzhen Chang Long Technology Co., Ltd is one of the largest environmentally friendly pharmaceutical manufacturer and marketing enterprise in Southern of China. We sell 15000 tons of ferrous sulfate and more than 5000 tons of aluminum sulfate monthly. We have operated the business in good faith, providing high quality products and quality service. We have won a high reputation among clients.

We have 10 Engineers and 4 senior University professors and provide technical guidance. We aim to help customers optimize the sewage treatment process, to utilize waste and environmental protection facilities, to reduce customers' costs and to promote an enterprise's integrated benefit, environmental benefit and social benefit.