2014.08-present: Asossiate Professor, Department of Applied mathematics, University of Science and Technology Beijing (USTB), China; 2001. 08-2014. 07:  lecturer, Department of Applied mathematics, University of Science and Technology Beijing (USTB), China; 2007. 9-2012. 01: PhD, Department of Mathematics, University of Agriculture, China; 1998.09-2001.07：M aster, Department of Mathematics, Northeast Normal University,China; 1994.09-1998.07: Bachelor, Department of Mathematics, Northeast Normal University,China;