My research areas include information retrieval, natural language processing, text mining and machine learning. I have published more than 35 papers with more than 4000 citations in top conferences such as WWW, SIGIR, ACL, ICML, ICLR, EMNLP, CIKM, WSDM, ICDM and NAACL. Moreover, I have served as the SPC/PC member for top conferences including KDD, ACL, SIGIR, WWW, AAAI, EMNLP, WSDM and CIKM. I'm interested in research&development on deep learning, text matching, question answering, neural conversational models, search, ranking and relevance, learning to rank, statistical language models, probabilistic graphical models, user modeling/profiling and ads quality optimization.