Technical service, technology development, technology consultation, technology exchange, technology transfer, technology popularization; Software development; Internet sales (except sales of licensed goods); Machinery and equipment sales; Sales of electronic products; Communication equipment sales; Hardware wholesale; Lighting appliance sales; Commodity sales; Wholesale of edible agricultural products; Metal material sales; Sales of non-metallic minerals and products; Timber sales; Sales of chemical products (excluding licensed chemical products); Sales of plastic products; Sales of petroleum products (without hazardous chemicals); Sales of gold and silver articles; Sales of coal and its products; Domestic trade agent; Import and export of goods;