Cold chain technology, heat preservation technology, medical apparatus and instruments in the field of technology development, technology consultation, technology transfer, technical services, a class of medical equipment, insulation materials, rubber and plastic products, refrigeration equipment, textiles, labor protection supplies, stationery, temperature control equipment, daily provisions, valves, electrical equipment, instruments, machinery equipment, paper products, metal products, communications equipment, communications equipment, electronic products, electronic components, chemical raw materials and products (except hazardous chemicals, MCC, fireworks, civil explosives, precursor chemicals), auto parts wholesale and retail, edible agricultural products (except the pig products) sales, E-commerce (do not engage in value-added telecommunications, financial services), engaged in the import and export of goods and technology business.