| 2002— |
Vice-Chairman, 9th China Association for Promoting Democracy, Central Committee |
|
| 2000— |
Vice-Chairman, CPPCC, Municipal Committee Beijing Municipality |
|
| 1998—2003 |
Vice-Chairman, CPPCC, National Committee, Subcommittee for Handling Proposals |
|
| 1998—2003 |
Member, 9th CPPCC, National Committee, Standing Committee |
|
| 1997—2002 |
Vice-Chairman, 8th China Association for Promoting Democracy, Central Committee |
|
| 1993—1998 |
Member, CPPCC, Subcommittee of Foreign Affairs |
|
| 1993—1998 |
Member, 8th CPPCC, National Committee, Standing Committee |
|
| 1992—2000 |
Chairman, China Association for Promoting Democracy, Municipal Committee Beijing Municipality |
|
| 1992—1997 |
Member, 7th China Association for Promoting Democracy, Central Committee |
|
| 1992—1997 |
Deputy Secretary-General, 7th China Association for Promoting Democracy, Central Committee |
|
| 1988—1992 |
Alternate Member, 6th China Association for Promoting Democracy, Central Committee |
|
| 1984—1988 |
Member, China Association for Promoting Democracy, Central Committee, Executive Bureau |
|
| 1983—1988 |
Member, 6th CPPCC, National Committee, Standing Committee |
|
|
Vice-President, Beijing Teachers' College, Mathematics Department Beijing Municipality |
|
|
Dean, Beijing Teachers' College, Mathematics Department Beijing Municipality |
|
|
Professor, Beijing Teachers' College, Mathematics Department Beijing Municipality |
|
| 1961—???? |
Associate Professor, Beijing Teachers' College, Mathematics Department Beijing Municipality |
|
| 1949—???? |
Assistant Professor, Zhongshan University |
|
| 1948 |
Graduate, Zhongshan University, Mathematical Astronomy Department |
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