Engaging in technical services, technical development, and technical consulting in the fields of chemical engineering, biotechnology, and new material technology; business consulting; warehousing services (excluding hazardous materials); home appliance repair services; sales of chemical raw materials and products (excluding hazardous chemicals, monitored chemicals, fireworks, civilian explosives, and precursor chemicals), medical devices, electromechanical equipment and accessories, instruments and meters, and environmental protection equipment; and conducting import and export of goods and technology.