Professor, School of Mathematics and Statistics, Xi'an Jiaotong University, September 2022--Now.
Associate Professor, School of Mathematics and Statistics, Xi'an Jiaotong University, July 2016--September 2022.
Research Associate, Department of Mathematics, Penn State University, May 2013--June 2016.
Visiting Assistant Professor, Department of Mathematics, University of Iowa, January 2012--May 2013.
Lecturer, School of Mathematics and Statistic, Huazhong University of Science and Technology, Wuhan, China, July 2010--January 2012.