Professor Zhang’s research has centred on the fusion, integration, and dynamic updating of multi-source and heterogeneous geospatial information, together with digital and smart city technologies. He developed theoretical models and technical methods for the integrated processing, intelligent extraction, and adaptive updating of heterogeneous geospatial data, establishing a technological framework covering data integration, information extraction, database updating, and application. He also developed an intelligent platform for geospatial information fusion and dynamic spatial-database updating, addressing the integration of large-scale spatial datasets and associated database updates. Building on this work, he proposed a whole-lifecycle spatial-planning information platform for coordinated urban and rural development and developed city spatiotemporal information platforms integrating sensing, data fusion, analysis, decision-making, and services. These platforms have been implemented in nearly 20 cities, including Guangzhou, Chongqing, Shenzhen, Foshan, and Zhengzhou, supporting applications in land management, spatial planning, and geological-disaster monitoring. He has led more than 70 research projects, including seven funded by the National Natural Science Foundation of China, and has received two Second Prizes of the National Science and Technology Progress Awards and two First Prizes of the Guangdong Provincial Science and Technology Progress Awards. He has published more than 300 papers and authored five monographs and 12 textbooks, including several national planning textbooks, and developed the national-level online open course Introduction to Geographic Information Systems. He has supervised postdoctoral researchers and doctoral and master’s students throughout his academic career. Through sustained research on geospatial information integration and updating, its application to urban development, and GIS education, Professor Zhang has contributed to the advancement of geographic information science and the digital and smart transformation of cities in China.