Zhidan Liu is currently Assistant Professor in the College of Computer Science and Software Engineering, Shenzhen University, China. He received a Ph.D. degree in Computer Science and Technology from Zhejiang University, China, in 2014. Before joining in Shenzhen University, he was Postdoctoral Research Fellow in the School of Computer Science and Engineering, Nanyang Technological University, Singapore. Dr. Liu’s research interests include Internet of Things, urban computing, crowdsourcing, and big data analytics. He has published more than 20 research papers in top-tier international journals and conferences, including IEEE/ACM ToN, IEEE TMC, IEEE TITS, IEEE Network Magazine, IEEE IOTJ, ACM MobiSys, IEEE ICDE, ACM/IEEE IPSN, and ACM MobiHoc. He received the “Best Paper Award” of IEEE ICPADS 2020. Dr. Liu served as Technical Programme Committee Member of IEEE ICDCS, IEEE ICPADS, IEEE ICCCN, IEEE MSN, IEEE MASS, and IEEE HiPC. He is Member of IEEE, ACM, and CCF. Kaishun Wu is currently Distinguished Profe