Xiulong Liu is a professor in College of Intelligence and Computing, Tianjin University, China. Before that, he received the B.E. and Ph.D. degrees from Dalian University of Technology (China) in 2010 and 2016, respectively. He also worked as a visiting researcher in Aizu University, Japan; a postdoctoral fellow in The Hong Kong Polytechnic University, Hong Kong; and a postdoctoral fellow in the School of Computing Science, Simon Fraser University, Canada. His research interests include wireless human activity recognition, indoor localization and IoT security&privacy, etc. His research papers were published in many prestigious journals and conferences including TON, TMC, TC, TPDS, Mobicom, INFOCOM, and ICNP, etc. He received Best Paper Awards from ICA3PP 2014 and IEEE System Journal 2017. He is also the recipient of CCF Outstanding Doctoral Dissertation award 2017.