The business scope includes technology development, promotion, transfer, consulting, services, and development for sewage treatment, sewage resource utilization, water resource management, water treatment, activated carbon, flocculants, solid waste treatment, atmospheric environment governance, ecological engineering, and ecological restoration; Construction general contracting; Professional contracting; Water pollution control; Air pollution control; Solid waste pollution control; Construction project management; Commissioned processing machinery and equipment; Selling daily necessities, selling chemical products (excluding hazardous chemicals), electronic equipment, and mechanical equipment; Import and export of goods, technology, and agency import and export; Engineering design. Market entities shall independently choose their business projects and carry out business activities in accordance with the law; Engineering design and projects that require approval by law shall be carried out in accordance with the approved content after approval by relevant departments;