Manufacturing of metal packaging containers and materials; Manufacturing of plastic packing boxes and containers; Manufacturing of plastic products; Sales of metal packaging containers and materials; Sales of packaging materials and products; Manufacturing of metal daily necessities; Sales of metal chains and other metal products; Manufacturing of metal chains and other metal products; Hardware wholesale; Sales of building materials; Manufacturing of refrigeration and air conditioning equipment; Sales of building materials; Wire and cable management; Sales of doors and windows; Sales of metal products; Sales with metal parts for construction; Sanitary ware sales; Metal doors and windows engineering construction; Furniture sales; Sales of household appliances; Wholesale of kitchen utensils, sanitary ware and daily groceries; Sales of industrial automatic control system devices; Retail of medical masks; Production of protective articles for medical staff (Class I medical devices); Domestic trade agent; Sales of plastic products; Instrument sales; Retail of stationery; Sales of special packaging equipment; Ordinary glass container manufacturing; Manufacturing of medical packaging materials.