Sales of electronic products; Sales of household appliances; Sales of outdoor products; Retail of hardware products; Sales of chemical products; Sales of daily necessities; Sales of daily ceramic products; Sales of needle textiles; Sales of furniture; Sales of building materials; Sales of daily necessities; Sales of machinery and equipment; Retail of clothing and apparel; Sales of textiles and raw materials; Sales of office equipment consumables; Retail of sporting goods and equipment; Sales of cameras and equipment; Wholesale of computer software, hardware and auxiliary equipment; Domestic trade agents; Sales of household goods; Disinfection Sales of pharmaceuticals; Sales of hygiene products and disposable medical supplies; Retail of protective supplies for medical staff; Intermediary services for studying abroad at their own expense; Translation services; Technical services, technology development, technical consultation, technical exchange, technology transfer, and technology promotion.