[1] Associate Professor, School of Public Health, Zhengzhou University, 2017-

[2] Visiting Scholar, Washington State University，Voiland School of Chemical Engineering & Bioengineering  2019-2020

[3] Lecture, School of Public Health, Zhengzhou University, 2007-2016

[4] Assistant, School of Public Health, Zhengzhou University, 2004-2006