ChengXiang Zhai is a Professor of Computer Science and Willett Faculty Scholar at the University of Illinois at Urbana-Champaign, where he also holds a joint appointment at the Institute for Genomic Biology, Statistics, and the Graduate School of Library and Information Science. He has been teaching two Massive Open Online Courses (Text Retrieval and Search Engines; Text Mining and Analytics) on Coursera since 2015. He received a Ph.D. in Computer Science from Nanjing University in 1990, and a Ph.D. in Language and Information Technologies from Carnegie Mellon University in 2002. He worked at Clairvoyance Corp. as a Research Scientist and a Senior Research Scientist from 1997 to 2000. His research interests include information retrieval, text mining, natural language processing, machine learning, biomedical informatics, and intelligent education systems. He has published over 200 papers in these areas. He served as an Associate Editor of ACM Transactions on Information Systems, and Information Processing and Management, and on the editorial board of Information Retrieval Journal. He is a program co-chair of ACM CIKM 2004 , NAACL HLT 2007, ACM SIGIR 2009, ECIR 2014, WWW 2015, and ICTIR 2015. He is a general conference co-chair of CIKM 2016. He is an ACM Distinguished Scientist, and received a number of awards, including multiple best paper awards such as the ACM SIGIR 2004 Best Paper Award, and the ACM SIGIR 2014 Test of Time Award, the 2004 Presidential Early Career Award for Scientists and Engineers (PECASE), an Alfred P. Sloan Research Fellowship, multiple research awards from industry (IBM Faculty Award, HP Innovation Research Award, Microsoft Beyond Search Research Award , and Yahoo Faculty Research Engagement Program Award), UIUC Rose Award for Teaching Excellence, and UIUC Campus Award for Excellence in Graduate Student Mentoring.