General business items are: Information technology consulting services; Engineering and technical research and experimental development; New material technology research and development; Computer system services; Industrial control computer and system manufacturing; Computer hardware and software and peripheral equipment manufacturing; Information system integration service; Technical services, technology development, technology consultation, technology exchange, technology transfer and technology promotion; Network and information security software development; Intelligent control system integration; Calculator equipment manufacturing; Industrial control computer and system sales; Software development; Artificial intelligence application software development; General parts manufacturing; Environmental protection special equipment manufacturing; Integrated circuit manufacturing; Electronic components manufacturing; Computer and office equipment maintenance; Communication equipment repair; Computer and communication equipment rental; Machinery and equipment leasing; Information security equipment manufacturing; Information security equipment sales; Machinery and equipment sales; Wholesale of electronic components; Communication equipment sales; Sales of electronic products; Optical communication equipment sales; Computer hardware and software and auxiliary equipment wholesale; Computer hardware and software and ancillary equipment retail; Trade agency; Project management services; Professional design services. (Except for the projects subject to approval according to law, independently carry out business activities according to law with the business license), the permitted business projects are: Intelligent building system design; Import and export of goods; Technology import and export; Import and export agents; Construction of intelligent building; Construction project construction. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, and the specific business projects shall be subject to approval documents or licenses of relevant departments)