

Professor, School of Public Health, Zhengzhou University, 2019-
Associate Professor, School of Public Health, Zhengzhou University, 2017-2019
Visiting Scholar, Cancer Center, Yale University School of Medicine, 2016-2017
Associate Professor, School of Public Health, Zhengzhou University, 2013-2016
Deputy Director (Visiting Position), Zhoukou City Center for Disease Control and Prevention, 2012-2013
Lecturer/Associate Professor, School of Public Health, Zhengzhou University, 2008-2012.
Physician/Chief Physician, Zhengzhou Occupational Disease Prevention and Treatment Institute, 1998-2005