Professor of the Department of History/Institute of Humanities at Tsinghua University, Guest Research Fellow of the Fairbank Center for Chinese Studies at Harvard University, Harvard Yenching Scholar; Major research fields: Peasant History, Economic History; Selected works: Traditional Ten Problems (2005) [Chinese], 10 Years’ Vicissitude: the Transformation of Economic Society and Though Transition of the Countries in Eastern Europe (2004) [Chinese], Practice Freedom (2004), Peasant China: Historical Reflection and Realist Choice (2003) [Chinese].