Wanjie Hu works as a research associate (post-doctor) at Nanjing University of Science and Technology (NJUST, China), School of Safety Science and Engineering. He graduated from Beijing University of Technology (BJUT, China) with a doctoral degree in engineering. He is also a council member Underground Space Branch of the China Rock Mechanics and Engineering Society (CRMES). His research experience is focused on quantitative methods (i.e., mathematical models and algorithms) for underground logistics systems (ULS) planning, operations management, and solving other underground transportation issues. He works closely with Chinese ULS research communities and is dedicated to promoting innovations in ULS practice, such as metro-based ULS, underground container transportation, and smart utility tunnel. His research appears in publications of Transportation Research Part A, Transport Policy, Sustainable Cities and Society, Computers & Industrial Engineering, International Journal of Production Research, Tunnelling and Underground Space Technology, and so on, receiving 1000+ citations in Google Scholar.