2016-present:Professor,Jiangnan University, Wuxi,China
2004-2016:Professor, Ocean University of China, Qingdao,China
2014-2015:VisitingScholar, University of Massachusetts, USA
2003-2004: Postdoctoral Research Scientist, Department of Cooperative Research, Lincoln University, Missouri. USA
2002-2003: Postdoctoral Research Scientist, Department of Natural Resource Ecology and Management, Iowa State University. USA.
1998: SeniorVisitingScholar, Institute of Plant Nutrition, University of Hannover, Germany
1993-1998:Lecturer&ResearchSecretary,Department of Plant Nutrition, China Agricultural University, China