She specializes in Web search and recommendation and Web user modeling. Currently she is also the vice director of State Key Lab. of Intelligent Technology and Systems, the executive director of Tsinghua University-Microsoft Research Asia Joint Research Lab on Media and Search. She also serves as associate editor for the ACM Transaction on Information Systems (TOIS), Program co-Chair ofWSDM2017 and AIRS 2016, area chairs or senior PC members at SIGIR, CIKM, and PC members at WWW, IJCAI, KDD, AAAI, ACL, etc. She has published more than 70 papers in important international journals and conferences, and 12 of her patents are filed. She was awarded Beijing Science and Technology Award (First Prize) in 2016.