Long Zhan is an independent consultant specializing in underground utility locating, underground risk management, and underground infrastructure information. His work focuses on improving the reliability of underground information through investigation, interpretation, verification, and continuous updating. He has extensive field experience locating complex utility networks and is particularly interested in information quality, GIS, digital twins, asset management, and the lifecycle of underground infrastructure information. His current research explores how trusted underground information supports better infrastructure management and long-term decision-making.