Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Sales of Class I medical devices; Sales of Class II medical devices; Retail of cosmetics; Wholesale of cosmetics; Sales of personal hygiene products; Sales of hygiene products and disposable medical supplies; Sales of instruments and meters; Internet sales (except for the sale of goods that need to be licensed); Sales of daily necessities; Wholesale of daily necessities; Sales of daily miscellaneous goods; Sales of daily necessities; Engineering and technical research and experimental development; Retail of kitchenware, sanitary ware, and daily necessities; Wholesale of kitchenware, sanitary ware, and daily necessities; Sales of sanitary ceramic products; Research and development of Internet of Things technology; Sales of wearable smart devices; Third class medical device operation