1986.07–1992.10 Resident Physician, Emergency Department, Peking Union Medical College Hospital
1992.10–2000.04 Attending Physician, Emergency Department, Peking Union Medical College Hospital
2000.04–2007.10 Associate Chief Physician, Emergency Department, Peking Union Medical College Hospital
2007.10–2012.07 Chief Physician, Emergency Department, Peking Union Medical College Hospital
2012.08–2016.12 Vice President, Beijing Tsinghua Changgung Hospital
2016.12–Present Chief Physician, Department of General Practice, Beijing Tsinghua Changgung Hospital