His major research interests are in Web search, user behavior analysis, and natural language processing. He serves as co- Editor-in-chief of Frontiers and Trends of Information Retrieval (FnTIR), Program Co-chair of SIGIR2018, Short Paper Co-chair of SIGIR2017, Program Co-chair of NTCIR-13, General Co-chair of AIRS2016 as well as (senior) program committee members of a number of important international academic conferences including SIGIR, WWW, AAAI, ACL and IJCAI. In 2016, he was supported by NSFC as an Outstanding Young Scholar (2017–2019).