Production of Class II medical devices; food business; production of medical masks; production of protective equipment for medical staff (Class II medical devices) General items: sales of Class II medical devices; production of Class I medical devices; sales of Class I medical devices; health care services (non-medical); sales of glasses (excluding contact lenses); sales of daily necessities; traditional Chinese medicine health care services (non-medical); retail of stationery; technical services, technology development, technology Consulting, technology exchange, technology transfer, technology promotion; health consulting services (excluding diagnostic and treatment services); retail of daily household appliances; sales of household appliances; glasses manufacturing; wholesale of stationery supplies; sales of office supplies; wholesale of medical masks; retail of medical masks; production of daily masks (non-medical); sales of daily masks (non-medical); sales of labor protection supplies; wholesale of protective supplies for medical staff; retail of protective supplies for medical staff; sales of electronic products