Sales of plastic packaging containers and tools for food use; manufacture of plastic packaging boxes and containers; research and development of new materials; promotion services for new material technology; manufacture and sales of plastic products; sales of specialized equipment for plastic processing; sales of specialized equipment for environmental protection; import and export of goods; manufacture and sales of specialized equipment for pharmaceuticals; manufacture and sales of bio-based materials; manufacture of specialized equipment for plastic processing; technical services, technical development, technical consultation, technical exchange, technology transfer, and technology promotion; research and development of resource recycling technology; research and development of bio-based materials; sales of machinery and equipment; sales of mechanical parts and components; manufacture of special machinery for water resources; manufacture of specialized equipment for environmental protection; manufacture and sales of office equipment consumables; manufacture and sales of specialized packaging equipment; sales of synthetic materials.