

[1] Dean, College of Public Health, Zhengzhou University, 2018-
[2] Distinguished Professor, College of Public Health, Zhengzhou University, 2017-
[3] President & Secretary of the Party Committee, Xinxiang Medical University, 2015-2017
[4] President, Xinxiang Medical University, 2012-2015
[5] Vice-President, Henan University of Science and Technology, 2002-2012
[6] Dean, College of Public Health, Zhengzhou University, 1996-2002
[7] Postdoctoral Researcher, CHIRON IRIS Institute, Italy, 1994-1995
[8] Associate Researcher, Chinese Academy of Preventive Medicine, 1993-1994