Scope: Electronic products sales Electronic products sales; Wholesale of electronic components; Maintenance of electronic and mechanical equipment (excluding special equipment); Instrument sales; Instrumentation repair; Intelligent instrument sales; Machinery and equipment sales; Machinery and equipment leasing; Mechanical equipment research and development; Hardware products retail; Sales of machinery parts and spare parts; Metal material sales; Sales of Class I medical devices; Pet food and supplies retail; Agricultural machinery sales; Electrical equipment sales; Electrical equipment repair; Fire equipment sales; Intelligent robot sales; Retail of computer hardware, software and ancillary equipment: Retail of arts and crafts and collectibles (except ivory and its products); Metal ore sales; Non-metallic ore and products sales; Timber sales; Daily wood products sales; Technical services, technology development, technology consultation, technology exchange, technology transfer and technology promotion; Internet sales (except sales of goods that require permission); Import and export of goods; Technology import and export.