General items: Auto parts wholesale; Metal materials sales; Metal packaging containers and materials sales; Construction metal accessories sales; Rubber products sales; Mold sales; Tool sales; Forging and powder metallurgy products sales; Metal tools sales; Metal forming machine tools sales; Additive manufacturing equipment sales; Plastic processing special equipment sales; Photovoltaic equipment and components sales; High-quality special iron and steel materials sales; Internet sales (except for the sale of licensed goods); Offshore trade operation; Procurement agency services; Trade brokerage; Domestic trade agents; Sales agents; Import and export agents; Goods; Technology import and export; Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion.