| 1997— | Vice-President, Tsinghua Tongfang Co. Ltd. Beijing Municipality | |
| 1997— | Director-General, Tsinghua Tongfang Co. Ltd. Beijing Municipality | |
| 1989—1997 | General Manager, Beijing Tsinghua Artificial Environment Engineering Co. Beijing Municipality | |
| 1977—1996 | Professor, Tsinghua University, Heat Energy Engineering Department Beijing Municipality |