Sales of metal materials; Sales of metal products; Sales of mechanical equipment; Sales of intelligent unmanned aerial vehicles; Lamp sales: Sales of toys, animation and entertainment products; Sales of electronic products; Technical services, technical development, technical consultation, technical exchange, technology transfer and technology promotion; Sales of plastic products; Sales of raw and auxiliary materials for shoemaking; Wholesale of auto parts; Sales of mechanical parts and components; Wholesale of jewelry; Sales of Arts and crafts and etiquette supplies (except ivory and its products); Clothing wholesale; Hair accessories sales; Sales of daily necessities; Luggage sales; Daily wood products sales; Sales of special packaging equipment; Automobile decoration products sales, shoes and hats wholesale; Sales of labor protection articles; Sales of manufacturing machinery; Wholesale of cosmetics; Sales of personal hygiene products; Sales of special labor protection articles; Calculator equipment sales; Sales of leather products; Sales of pumps and vacuum equipment; Industrial robot sales; Sales of mechanical and electrical equipment; Sales of agricultural, forestry, animal husbandry and fishery machinery accessories; Fishery machinery sales, musical instrument spare parts sales; Sales of office equipment (except for projects subject to approval according to law, business activities shall be carried out independently according to law with business license).