Research and development of new materials; manufacturing of plastic products; sales of plastic products; manufacturing of rubber products; sales of rubber products; sales of machinery and equipment; manufacturing of office equipment consumables; sales of office equipment consumables; sales of electronic products; manufacturing of specialized equipment (excluding licensed specialized equipment); domestic trade agency; online sales (excluding goods that require a license for sale); import and export of goods; import and export of technology; manufacturing of engineering plastics and synthetic resins; sales of engineering plastics and synthetic resins.