Zhan Zhang is currently an Associate Research Fellow at the Spatio-Temporal Intelligence Reliability Data Analysis Centre, The Hong Kong Polytechnic University (PolyU). His research focuses on efficient AI and AI agents, including efficient vision foundation models and multimodal models, with a particular emphasis on reliable agentic systems for real-world deployment under resource constraints. He was a major developer of LuoJiaNET, the intelligent remote sensing deep learning framework developed at Wuhan University. Over the years, he has been actively engaged in remote sensing vision research, with broader interests in geospatial foundation models, multimodal geospatial intelligence, and trustworthy AI systems for Earth observation applications.