Engaged in technology development, technology transfer, technical consulting, technical services, computer system integration, software development, supply chain management, machinery and equipment, mechanical and electrical equipment leasing (not engaged in financial leasing), mechanical equipment, mechanical and electrical equipment installation and maintenance (except special equipment), mechanical equipment and accessories, mechanical and electrical equipment and accessories, computers, software and auxiliary equipment, communications equipment and related products, communications equipment, electronic components, instrumentation, wire and cable, mold, metal materials, Metal products, labor and defense supplies, daily necessities sales, engaged in the import and export of goods and technology import and export business.