1994 to 1997, studied by master students majoring in Dunhuang studies in the history department of Capital Normal University.
1997-2000, Ph.D. student majoring in China ancient history, Department of History, Capital Normal University. Since 2000, he has been teaching in the history department of Capital Normal University, and was awarded the title of lecturer in the same year.
From June 5438 to February 2004, he was awarded the title of Associate Professor.