1982.3 ~ 1987.6 teaching assistant, Department of Geography, Beijing Normal University.
1987.6 ~ 1993.6 Department of Geography, Beijing Normal University, lecturer.
1988.8 obtained the Master of Science degree from Beijing Normal University.
1993.6 ~ 200 1.6 Associate Professor, Department of Resources and Environmental Sciences, Beijing Normal University.
1999.8 obtained the doctor of science degree from the Institute of Geography, China Academy of Sciences.
200 1.6 Professor, Department of Resources and Environmental Sciences, Beijing Normal University
From June 2002 to present, he has been a professor and doctoral supervisor at the School of Geography and Remote Sensing Science of Beijing Normal University.