Shenzhen Changlong Technology Co., Ltd. Was established on July 29, 2003, and its registered address is A501, No. 22, Puzi Road, Pingdi Street Central Community, Longgang District, Shenzhen (an enterprise with one license and multiple addresses). The business scope includes general business items: Environmental science and technology research services; Water pollution control; Sewage treatment and recycling; Sales of special equipment for environmental protection; Sales of environmental protection instruments; Sales of special agents and materials for environmental pollution treatment (excluding monitored chemicals and hazardous chemicals); Special design services for environmental engineering; Construction of environmental protection facilities; Environmental assessment; Environmental protection monitoring; Ecological monitoring; Indoor environment detection; Water pollution monitoring; Water and soil conservation monitoring; Air pollution monitoring; Noise pollution monitoring; Waste monitoring; Software development; Data processing and storage services; Trade in environmental protection and governance commodities (except for licensed and approved commodities); Technology import and export; Technical services for sales of membrane treatment agents; Import and export of goods (Projects that need to be licensed according to law can only be operated after obtaining permission). Software sales. (Except for projects that need to be approved according to law, they can independently carry out business activities according to law with their business licenses). The permitted business items are: Special equipment for environmental protection, environmental protection instruments, special reagents for environmental pollution treatment, material manufacturing (except for monitored chemicals and hazardous chemicals), and the manufacturing of electronic equipment for computer applications; General freight; Lime production and sales (except for the products exclusively operated and controlled); Production of membrane treatment agents.