Medical equipment leasing; mechanical equipment leasing; non-residential real estate leasing; housing leasing; external contracting projects; office equipment sales; hardware wholesale; second-class medical equipment sales; first-class medical equipment sales; Stationery supplies wholesale; electronic special equipment sales; optical instruments sales; daily necessities sales; labor protection supplies sales; health supplies and disposable medical supplies sales; experimental and analytical equipment sales; Sales of building decoration materials; wholesale of protective articles for medical staff; development of human gene diagnosis and treatment technology; technical service, technology development, technology consultation, Technology Exchange, technology transfer, technology promotion; Medical Research and experimental development; the third kind of medical device management