Artificial intelligence basic software development; Intelligent basic manufacturing equipment manufacturing; Intelligent instrument manufacturing; Intelligent basic manufacturing equipment sales; Sales of electronic products; Retail of photographic equipment and telescopes; Sales of household appliances; Metal cutting and welding equipment manufacturing; Metal cutting and welding equipment sales; Optoelectronic device manufacturing; Technology import and export; Sales of electronic components and electromechanical components; Import and export of goods; Network and information security software development; Artificial intelligence hardware sales; Research and development of intelligent robots; Industrial robot manufacturing; Industrial robot sales; Research and development of electronic special materials; Computer system services; Information system integration services; General equipment manufacturing (excluding special equipment manufacturing); General equipment repair; Machinery and equipment sales; Manufacture of industrial control computers and systems; Electromechanical coupling system development; General mechanical equipment installation services; Additive manufacturing equipment manufacturing; 3D printing services; 3D printing basic materials sales; Sales of metal products; Metal material sales; Sales of building decoration materials; Building decoration, plumbing parts and other building metal products; Instrument sales; Sales of chemical products (excluding licensed chemical products); Metrological technical services; Design and construction services of safety technology prevention system; Socio-economic advisory services; Financial advice. (In addition to the items subject to approval according to law, independently carry out business activities according to the business license) Licensed items: Inspection and testing services. (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 the approval results)