Sales of household appliance spare parts; Sales of mobile terminal equipment; Retail of household appliances; Computer and communication equipment leasing; Wire and cable management; Computer system services; Power electronic components sales; Electronic product sales; Internet sales (except for the sale of goods that require a license); Communication equipment sales; Office equipment sales; Office equipment consumables sales; Sales of office supplies; Daily department store sales; Wholesale of hardware products; Sales of advanced power electronic devices; Optoelectronic device sales; Sales of electronic special materials; Trade brokerage; Domestic trade agency; Sales agent