General projects: Technical services, technical development, technical consultation, technical exchange, technical transfer, technical promotion; Sales of gas compression machinery; Sales of mechanical equipment; Leasing of mechanical equipment; Sales of petroleum products (excluding dangerous chemicals); Sales of chemical products (excluding dangerous chemicals); Sales of plastic products; Sales of plastic processing special equipment; Sales of rubber processing special equipment; Sales of packaging materials and products; Retail of hardware products; Wholesale of packaging special equipment products; Sales of special chemical products (excluding dangerous chemicals); Sales of special equipment; Repair of special equipment; Repair of electrical equipment; Installation services of general mechanical equipment; Energy storage technical services; Sales of gas, liquid separation and purification equipment; Operation efficiency assessment services; Sales of high-performance sealing materials; Sales of lubricating oil; Wholesale of refined oil products (excluding dangerous chemicals as per business license) (except for projects that require approval by law, mainly carry out business activities)