Our products: Polyacrylamide, Flocculant, Retention Aid, Dewatering Agent, etc. Shenzhen Chang Long Technology Co., Ltd is the largest environmentally friendly pharmaceutical production and marketing enterprise in Southern China. We sell 15000 tons of ferrous sulfate and more than 5000 tons of aluminum sulfate monthly. For the convenience of our customers, our company sets up offices in Guangzhou, Shenzhen and Zhongshan. 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. We