General projects: Sales of photovoltaic equipment and components; Sales of generators and generator sets; Optical communication equipment sales; Steam turbine and auxiliary machinery sales; Computer equipment sales; Retail of computer hardware, software and ancillary equipment; Sales of metal products; Power dynamometer motor sales; Electronic special equipment sales; Electrical equipment sales; Machinery and equipment sales; Optical fiber sales; Retail of electronic components; Office equipment sales; Furniture sales; Commodity sales; Furniture parts sales; Sales of thermal insulation materials; Building waterproof coil product sales; Office supplies sales; Sales of coal and its products; Sales of household appliances; Electric wire and cable operation; Sales of electrical and mechanical equipment; Household appliance installation services; Household electrical appliance repair; Residential water and electricity installation and maintenance services; Furniture installation and repair services; General merchandise sales; Electrical equipment repair; Human resource services (excluding job intermediary activities and labor dispatch services); Labor service (excluding labor dispatch); Fire equipment sales; Information consulting services (excluding licensed information consulting services); Engineering management services. (Except the items subject to approval according to law, independently carry out business activities according to law with the business license) Permitted items: Food business; All kinds of engineering construction activities; Import and export of goods; Technology import and export. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, and specific business projects shall be subject to approval documents or licenses of relevant departments)