He obtained his Ph.D degree in 1999 in Lanzhou University, China and joined NUS in December 2007. During 2001-2007 he worked at the Data Storage Institute as a research scientist. He has authored/co-authored more than 240 refereed journal papers, 3 book chapters, holds over ten patents and has made more than 30 invited presentation in the international conferences. His research work has obtained more than 3000 non-self-citations with H index of 27.