General items: Technical services, technology development, technology consultation, technology exchange, technology transfer, technology promotion; Engineering and technology research and experimental development; Sales of bio-based materials; Sales of specialized chemical products (excluding hazardous chemicals); Sales of Class I medical devices; Sales of Class II medical devices; Wholesale of medical staff protection supplies; Leasing of medical equipment; Sales of experimental analysis instruments; Sales of instruments and meters; Sales of mechanical equipment; Sales of office equipment consumables; Sales of office supplies; Sales of plastic products; Sales of rubber products. (Except for projects that require approval according to law, carry out business activities independently in accordance with the business license.