He received his PhD degree from Beijing University of Posts & Telecommunications in 2007. After that, he has worked as a research associate in the Biometric Research Center at the Hong Kong Polytechnic University, and a postdoc in the PRIP lab at Michigan State University. He has published over 30 papers in journals and conference, among which two received the best student paper awards on SIBGRAPI 2010 and IJCB 2011, and one received the best paper award on ICIEA 2012. He has served as program committee member of major biometrics conferences (ICB 2011-2013, BTAS 2012, SPIE Biometrics 2010-2011, CCBR 2012-2013), and has been a reviewer of several major image processing and pattern recognition journals (IEEE Trans. on TPAMI, TIP, TIFS, etc.).