He received his BSc at Shanxi Agricultural University, and a PhD in Soil Science at Nanjing Agricultural University. A major focus of his work is counting and modeling of greenhouse gas emissions from agricultural activities. Research activities include developing ecosystem model for estimating greenhouse gas emissions and carbon dynamics for agro-ecosystem, approaches to quantify carbon footprints of various agricultural products, and methodology for agricultural GHG emissions reductions used in the voluntary carbon trading projects, and estimating risks from climate change impacts on agro-production.