Technical services, technical development, technical consulting, technical exchanges, technology transfer; **technology promotion**; Wholesale and retail of computer software, hardware, and auxiliary equipment; Intelligent control system integration; Sales of industrial control computers and systems; Technical services for cloud computing equipment; Information system integration services; Software development; Artificial intelligence industry application system integration services; Computer system services; Industrial internet data services; Sales of optical communication equipment; Wholesale of hardware products; Sales of plastic products; Sales of office supplies; Sales of paper products; Wholesale of stationery; Sales of handicrafts and ceremonial products (excluding ivory and its products); Internet sales (except for goods requiring permits); Wholesale of clothing and apparel; Sales of daily necessities; Conference and exhibition services; Sales of luggage and bags; Sales of daily ceramic products; Sales of toys, anime, and recreational products; Sales of daily glass products; Sales of non-metallic minerals and products; Sales of household appliances; Sales of labor protection products; Advertising publishing; Advertising design and agency; Engineering management services (Except for projects subject to approval by law, business activities are carried out independently in accordance with the business license).