Licensed Projects: Fire protection facility construction, Various engineering construction activities, Import and export of goods, Technology import and export( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business items are subject to the approval results.) General Projects: Non-ferrous metal alloy manufacturing, Metal structure manufacturing, Steel rolling processing, Environmental sanitation public facilities installation services, General mechanical equipment installation services, Manufacturing of special equipment for environmental protection, Sales of special equipment for environmental protection, Special equipment manufacturing( Excluding licensed professional equipment manufacturing), Refrigeration、 Air conditioning equipment manufacturing, Refrigeration、 Air conditioning equipment sales, fan、 Fan Manufacturing, fan、 Fan Sales, Firefighting equipment sales, Wastewater treatment and recycling, Railway transportation equipment sales, Railway transport support activities, Railway locomotive and vehicle parts sales, Advertising Design、 acting, Advertising Production, Glass fiber and product manufacturing, Sales of glass fiber and products, Sales of non-metallic minerals and products, Technical glass manufacturing, Rubber product sales, Plastic product sales, Cement product sales, Metal product sales, Special equipment repair, General equipment repair, Electrical equipment repair, Electrical equipment sales, Sales of distribution switch control equipment, Sales of generators and generator sets, Sales of special electronic equipment, Information technology consulting services, Sales of traffic and public management signs( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)