His research interests include database system architectures, query and index techniques, big data management and mining. He has served in the Technical Program Committee of various international conferences including SIGMOD, VLDB, ICDE and KDD, and as Vice PC Chair of ICDE 2011, Demo Co-Chair of ICDE 2014, Area Chair of VLDB 2014, PC Co-Chair of APWeb 2015 and WAIM 2016. He is serving as a Trustee Board Member of VLDB Endowment, is also in the Editorial Board of VLDB Journal, Distributed and Parallel Databases Journal, and Information Systems, and was an assocaite editor of IEEE Transactions on Knowledge and Data Engineering (TKDE, 2009-2013). He has been awarded Microsoft Young Professorship award (MSRA 2008), CCF Young Scientist award (2009), and Second Prize of Natural Science Award of MOE China (2014) .