General project: Sales of intelligent instruments and meters; Sales of intelligent power transmission and distribution and control equipment; Sales of power facilities and equipment; Wholesale of hardware products; Sales of electronic products; Operation of wires and cables; Sales of optical communication equipment; Sales of cloud computing devices; Sales of digital video surveillance systems; Sales of office equipment; Sales of building decoration materials; Sales of security equipment; Network equipment sales; Internet equipment sales; Sales of lighting fixtures; Wholesale of computer software, hardware, and auxiliary equipment; Maintenance of electronic and mechanical equipment (excluding special equipment); Residential water and electricity installation and maintenance services; Information system integration services; Software development; Integration of intelligent control systems; Information technology consulting services; Internet of Things technology services; Construction of earthwork engineering; Construction of landscaping and greening projects; Leasing of construction machinery and equipment; Installation services for ordinary mechanical equipment; Computer system services; Network technology services; Internet security services; 5G communication technology services; Research and development of Internet of Things technology. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law) Licensed projects: Residential interior decoration and renovation; Installation, maintenance, and testing of transmission, power supply, and receiving power facilities; Electrical installation services. (For projects that require approval according to law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or permits issued by relevant departments. )