1968.05438+0-1982.03 Engineer, Institute of Physical and Chemical Engineering, Ministry of Nuclear Industry (Tianjin)
1982.04- 1988.09 Senior Engineer/Deputy Chief Engineer of Tianjin Mechanical Seal Factory
1988.10-1996.04 Senior Engineer/Chief Engineer of Tianjin Kelan Seal Co., Ltd.
1996.05-2005.08 Senior Engineer/Chief Engineer of Dingming Seal Co., Ltd., Tianjin New Technology Industrial Park
September 2005-August 2007 Senior Engineer/Chief Engineer of Tianjin New Technology Industrial Park Management Committee
September 2007-Today, Tsinghua University Department of Precision Instruments and Mechanics/Professor department of mechanical engineering.