Xu (David) Xin is a postdoctoral fellow at the Department of Logistics and Maritime Studies, The Hong Kong Polytechnic University (PolyU). He holds two Ph.D. degrees, earned through a joint program from The Hong Kong Polytechnic University (supervised by Prof. Shuaian Wang) and Tongji University (supervised by Prof. Xiaoli Wang). He previously completed his Bachelor's degree at Dalian Maritime University, graduating with top honors (Rank: 1/32). Dr. Xin's research focuses on port management, shipping network design, and transportation system optimization using advanced operations research methodologies. A prolific early-career researcher, he has authored or co-authored over 30 SCI/SSCI journal papers. His notable academic works include several where he served as the corresponding author, such as a study on the integrated governance of the Yangtze River Delta port cluster published in Ocean & Coastal Management, which was recognized as an ESI Top 1% highly cited paper. He is actively involved in the academic community, serving as an Academic Editor for PLOS ONE and a Guest Editor for a special issue in Frontiers in Marine Science. He also served as a member of the Faculty Research Committee at PolyU's Faculty of Business (2024-2025).