1September, 1997 to1May, 1999, studied for a doctorate in the Department of Mathematics, joensuu University, Finland.
1999 10 turn 1999 12, studying in the advanced training class for educational administrative cadres of Beijing Normal University.
From 0 1 2004 to 65438+2/2004, he conducted postdoctoral research in the Department of Mathematics of Belan University, Israel.