R&D, manufacturing, and sales: vacuum cleaners, air filtration equipment, smart sweepers, small household appliances and accessories, and providing consulting services for related products; self-operated and agent import and export business of various commodities and technologies (except for commodities and technologies that are restricted by the state or prohibited from import and export). Retail of medical masks; wholesale of medical masks; production of daily masks (non-medical); sales of daily masks (non-medical); production of labor protection products; sales of second-class medical devices; retail of protective products for medical staff; wholesale of protective products for medical staff; labor protection product sales license items: Medical mask production General items: rubber product manufacturing; rubber products Sales of rubber products; manufacturing of plastic products; sales of plastic products; sales of special equipment for plastic processing; retail of hardware products; sales of molds; retail of electronic components; research and development of new material technology; research and development of hardware products; leasing of second-class medical devices; sales of sanitary products and disposable medical supplies; manufacturing of sporting goods and equipment; retail of sporting goods and equipment