1983 to 1986 works in the yellow river hydraulic research institute.
Visiting scholar at San Diego State University, California, USA 1986 to 1987.
1987 to 1994, Master, Doctor, Visiting Professor, Lamar University, Texas, USA.
1994- 1995, assistant to the president of the yellow river hydraulic research institute and deputy director of the sediment research institute.
1995 to 1996, Yellow River Conservancy Commission, assistant to the chief engineer.
1996-2003, President and Party Secretary of Yellow River Hydraulic Research Institute.
Since 2003, he has served as chairman and party secretary of the Yellow River Survey Planning and Design Co., Ltd. ..