Retail of hardware products; Retail of computer software and hardware and auxiliary equipment; Sales of electronic products; Display sales; Advertising design and agency; Retail of photographic equipment and telescope; Sales of communication equipment; Software development; Sales of smart home consumer equipment; Internet of Things equipment sales; Sales of office equipment; Retail of sporting goods and equipment; Retail of kitchenware, sanitary ware and daily necessities; Toy sales; Technical service, technical development, technical consultation, technical exchange, technology transfer and technology promotion.