Technical services, technological development, technical consultation, technical exchanges, technology transfer, and technology promotion; Manufacturing of intelligent basic manufacturing equipment; Sales of intelligent basic manufacturing equipment; Manufacturing of domestic waste treatment equipment; Sales of domestic waste treatment equipment; Manufacturing of special equipment for environmental protection; Sales of special equipment for environmental protection; Research and development of carbon reduction, carbon conversion, carbon capture, and carbon storage technologies; Manufacturing of greenhouse gas emission control equipment; Sales of greenhouse gas emission control equipment; Leasing services (excluding licensed leasing services); Building cleaning services; Municipal facilities management; Engineering management services; Loading and unloading services. (Except for projects that require approval according to law, business activities shall be carried out independently in accordance with the business license) (Projects that require approval according to law shall be carried out after approval by relevant departments)