General project: Sales of electronic products; Retail of computer software, hardware, and auxiliary equipment; Sales of office supplies; Sales of office equipment; Sales of office equipment consumables; Network equipment sales; Sales of communication equipment; Sales of security equipment; Sales of chemical products (excluding licensed chemical products); Sales of labor protection equipment; Sales of mechanical and electrical equipment; Sales of household appliances; Daily electrical appliance repair; Computer and office equipment maintenance; Information system operation and maintenance services; Leasing services (excluding licensed leasing services) (except for licensed businesses, projects that are not prohibited or restricted by laws and regulations can be operated independently in accordance with the law)