Sales of metal chains and other metal products; Information technology consulting services; Leather sales; Sales of rubber products; Sales of daily chemical products; Sponge product sales; Sales of metal products; Sales of clothing accessories; Sales of leather products; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Domestic trade agency; Internet sales (except for the sale of goods that need to be licensed); Sales of feathers (down) and related products; Sales of paper products; Sales of plastic products; Sales of needle textiles and raw materials; Sales of needle textiles; Wholesale of stationery supplies; Retail of stationery products; Ink sales (excluding hazardous chemicals); ; Import and export of goods; Technology import and export; Import and export agency