aim at understanding human-environment interactions through focus on vegetation and climate changes using eddy covariance (EC) technique in various ecosystems. Leading built 18 EC towers, attending built another 22 sets. Now I am maintaining 9 towers on grassland in Mongolian Plateau and 3 towers over Great Lakes, including transect investigation and field work from 2006 until now. I served the NASA LCLUC, NSF, NSFC, 973. In 2009, I was elected fellow of the US-China Carbon Consortium (USCCC).