Sebastian Wandelt is a professor at Beihang University. He has a PhD in computer science. His work is broadly on the design and evaluation of algorithms and data management techniques in transportation, with a focus the underlying computational challenges. In addition, he has an interest in the optimization of complex systems. The results of his research are published in leading transportation journals such as Transportation Science, Transportation Research Part A/B/C/D/E, European Journal of Operational Research, Computers & Operations Research, and IEEE Transactions on Intelligent Transportation Systems. He is an associate editor of Transportation Research Part A: Policy and Practice.Xiaoqian Sun is a professor at Beihang University. She has a PhD in airspace engineering. Her research interests are mostly in air transportation-related optimization as well as transport policy. Her research has been published in journals such as Transportation Research Part A/B/C/D/E, Journal of Transport Geography, Transport Policy, Journal of Air Transport Management, Networks and Spatial Economics, and Transportmetrica A/B. She is a Theodore von Kármán fellow of RWTH Aachen, a TU Dresden fellow, and a Vice President of the Air Transport Research Society. She is the Co-EIC of the Journal of the Air Transport Research Society, an Associate Editor for the Journal of Air Transport Management as well as for the IEEE Transactions on Intelligent Transportation Systems. She is on the editorial board of various transportation journals, such as Transportation Research Part D as well as Research in Transportation Business & Management.