| 2004— | Executive Director, IRICO Electronics Group Corporation | |
| 2004— | Chairman, IRICO Electronics Group Corporation | |
| 2001—2004 | Vice-Chairman, IRICO Electronics Group Corporation | |
| 2000—2001 | Executive Manager, Shaanxi Color Picture Tube Plant | |
| 1998—2000 | Director, IRICO Electronics Group Corporation |