General Projects: Earthwork and stonework construction; Engineering management services; Industrial engineering design services; Engineering technical services (excluding planning management, survey, design, and supervision); Technical services, technology development, technical consultation, technical exchanges, technology transfer, and technology promotion; New material technology research and development; New material technology promotion services; Solar power generation technical services; Environmental protection consulting services; Special equipment manufacturing (excluding licensed professional equipment manufacturing); General equipment manufacturing (excluding special equipment manufacturing); Noise and vibration control services; Thermal insulation and sound insulation material manufacturing; Thermal insulation and sound insulation material sales; Soil environmental pollution prevention and control services; Water environmental pollution prevention and control services; Foreign contracted projects; Import and export of goods; Import and export of technology; Import and export agency; Domestic trade agency; Investment activities with own funds; Software development. (Except for projects that require approval according to law, business activities can be carried out independently with a business license. ) Licensed Projects: Construction engineering design; Construction engineering construction; Sewage treatment and its recycling; Power generation business, power transmission business, power supply (distribution) business; Installation, maintenance, and testing of power transmission, power supply, and power receiving facilities. (Projects that require approval according to law can only be carried out after approval by relevant departments. Specific business projects are subject to approval documents or licenses issued by relevant departments. )