| 2008— | Vice-Minister, Ministry of Science and Technology | |
| 2003—2008 | Vice-Chairman, People's Government Ningxia Hui Autonomous Region | |
| 1999—2001 | Assistant of Chairman, People's Government Ningxia Hui Autonomous Region | |
| 1999—2008 | Member, People's Government CPC, Leading Party Group Ningxia Hui Autonomous Region | |
| 1995—1999 | Vice-President, China Youth University for Political Sciences Beijing Municipality | |
| 1991—1995 | Student, State University of New York USA, New York | |
| 1990—1991 | Visiting Professor, State University of New York USA, New York | |
| 1987—1990 | Secretary, Beijing University CYLC, Institutional Level Beijing Municipality | |
| 1987—1990 | Member, Beijing University CPC, Party Committee Beijing Municipality | |
| 1987—1990 | Associate Professor, Beijing University, School of Mathematical Sciences Beijing Municipality |