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  • 2005.7-Now

     School of Mathematics | Shandong University | Professor  | 在职 

  • 1998.7-2005.7

     School of Mathematics | Shandong University | Associate Professor 

  • 1991.7-1998.7

     School of Mathematics | Shandong University | Lecturer 

  • 1986.7-1991.7

     School of Mathematics | Shandong University