[1] 2014.9  to  2016.3
Iowa State University
[2] 2007.9  to  2011.6
吉林大学 | 其他
[3] 2011.9  to  2016.6
吉林大学 | 其他

[1] 2019.7  to  2019.12
 Department of Geography and Regional Research, | University of Vienna 
[2] 2018.9  to  2020.9
 College of BIological and Agricultural Engineering | Jilin University 
[3] 2016.9  to  2018.9
 College of Electronic Science & Engineering | Jilin University 

[1] Conservation tillage of black soil
[2] Theory and design of intelligent agricultural machinery

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