Longbiao CHEN is an assistant professor with Fujian Key Laboratory of Sensing and Computing for Smart City, Xiamen University, China. He obtained his Ph.D. degree in computer science from Sorbonne University, France in 2018 and Zhejiang University, China in 2016, respectively. Before joining Xiamen University, he worked as a research assistant in Institut Mines-Télécom, France. His research interests include Ubiquitous Computing, Mobile Crowdsensing, Urban Computing, and Big Data Analytics. Dr. Chen has published over 30 papers in top-tier journals and conferences, including ACM UBICOMP, IEEE T-MC, IEEE T-ITS, and IEEE T-HMS. He received two UBICOMP Honorable Mention Awards in 2015 and 2016, respectively. He is a technical committee member of ACM SIGSPATIAL China and CCF Ubiquitous Computing Committee. He serves as the PC members of several conferences including IJCAI and UIC.