Sales of mechanical parts and components; leasing of machinery and equipment; research and development of motorcycles and parts; sales of chemical products (excluding licensed chemical products); sales of petroleum products (excluding hazardous chemicals); sales of communication equipment; sales of coatings (excluding hazardous chemicals); retail of computer software, hardware and auxiliary equipment; sales of metal products; sales of plastic products; Guangdong Advertising production; landscaping project construction; non-residential real estate leasing; conference and exhibition services (overseas exhibitions must be approved by relevant departments); office services; domestic trade agency; transportation cargo packaging service; domestic cargo transportation agency; sales of automobile decorative supplies; sales of daily necessities; warehousing equipment rental services; labor services (excluding labor dispatch).