1990—1990 | Senior Trademark Agent, Beijing Trademark and Patent Agency Beijing Municipality | |
1990— | Managing Director, Beijing Trademark and Patent Agency Beijing Municipality | |
1982—1989 | Director, Beijing Consulting Center for Industrial Affairs, Trademark and Advertising Department Beijing Municipality | |
1978—1982 | Director, Industry and Commerce Bureau Beijing Municipality | |
1971—1978 | Deputy Director, Industry and Commerce Bureau Beijing Municipality |