Manufacturing of experimental analysis instruments; research and development, production, sales, installation, maintenance and technical services and technical consultation of experimental equipment; Chemical reagents, consumables and raw materials (except hazardous chemicals), protective supplies, disinfection supplies, metal materials, instrumentation, medical equipment (operating with a valid license if approval is involved), ventilation equipment, Wujijiaodian (except electric vehicles and motorcycles), mechanical and electrical products, office equipment, office Supplies, cultural and sports supplies, fitness equipment, musical instruments, daily necessities, household appliances, communication equipment (except radio transmission and ground satellite receiving systems), measuring tools, electronic products (except licensing approval items), network equipment, wires and cables, power tools, photographic equipment, hotel equipment and supplies, New chemical materials (except hazardous chemicals), automobiles and accessories, ceramic products, audio equipment, sanitary ware, rubber products, cosmetics, gifts, leather products, refrigeration equipment, clothing, shoes, hats and accessories, handicrafts, primary agricultural products, teaching equipment, measuring equipment, traffic safety equipment, fire protection Sales of equipment, agricultural machinery and equipment, stainless steel products, glass products, plastic products, textiles, and teaching equipment; sales of digital products, security equipment, intelligent system equipment, computer software and hardware, environmental protection equipment, air purification equipment, technology development, technology consulting, technology transfer, and technology services; Furniture sales, installation, and repair; loading and unloading and transportation services; design and construction of earthworks, water and electricity installation projects, and building decoration projects (the above operations are operated with valid licenses); testing information consultation; graphic design and production; construction labor subcontracting; cleaning services.