Yulong Hu is currently a third-year Ph.D. candidate in Civil Engineering at the Hong Kong University of Science and Technology (HKUST), advised by Prof. Sen Li. Supported by the Hong Kong Ph.D. Fellowship Scheme (HKPFS) and HKUST Redbird Award, he aims to develop novel MARL frameworks for tricky large-scale systems like Smart Transportation and Energy Systems. Before embarking on his doctoral journey, Yulong obtained a Bachelor of Engineering in Electrical Engineering and Automation from the Hongshen Honor School at Chongqing University. He was also exchange student in Electronic and Electrical Engineering and Mathematics at Sungkyunkwan University and The University of Hong Kong, respectively.