Exhibition and convention services Property management Business information consultation Technology development, technology transfer, technology consultation and technology services in the professional field of information technology; Sales of metal materials, metal products, building decoration materials, computers and software and hardware (excluding special products for computer information system security), hardware and electrical appliances, mechanical and electrical equipment, electronic products, pipe fittings, rubber and plastic products, steel, fire-fighting equipment, and chemical products (excluding dangerous chemicals, monitored chemicals, fireworks and firecrackers, civil explosives, and precursor chemicals for drug manufacture); Engage in the import and export business of goods and technologies; Cargo transportation agency Landscape greening project Water and electricity installation (excluding the installation, maintenance and testing of power facilities). Business activities subject to approval by law may only be carried out after obtaining approval from the relevant authorities.