Research and development of environmental protection technology; Research and development of intelligent control systems; Packaging and decoration, printing of other printed materials; Production and sales of environmental protection equipment, non-woven fabric equipment, non-woven fabric products, stationery, office supplies, plastic products, paper products, craft gifts, luggage, cotton and linen products, needle textiles, labor protection equipment, electronic products and accessories, instruments and meters, and other daily necessities; Sales of Class I and Class II medical devices; Import and export of goods and technology (for projects that require approval according to law, business activities can only be carried out with the approval of relevant departments)