| 2008— | Vice-Chairman, 11th Standing Committee of the NPC | |
| 2007— | Deputy Director, Education, Science, Culture and Health Committee of the NPC | |
| 2007— | Chairman, Chinese Peasants and Workers Democratic Party | |
| 2003—2008 | Member, 10th Standing Committee of the NPC | |
| 2000—2007 | Vice-Chairman, Chinese Peasants and Workers Democratic Party | |
| 1999—2003 | Deputy Director, State Food and Drug Administration | |
| 1996 | Joined, Chinese Peasants and Workers Democratic Party | |
| 1992—2000 | Counselor, International Union of Pharmacology, Clinical Pharmacology Section | |
| 1989—1990 | Visiting Professor, Cornell University Medical College, New York Hospital, Medical Department USA, New York, New York | |
| 1983—1989 | Temporary Adviser, World Health Organization, Steering Committee for the Special Program of Research in Human Reproduction |