Professor Gong’s research has focused on the mapping and monitoring of global environmental change, remote sensing ecology, and the modelling of environmentally related infectious diseases and healthy cities, with particular emphasis on land-cover and land-use classification, quantitative estimation of forest and grassland ecological parameters, and multi-source spatial data analysis. Through sustained research and international collaboration, he has contributed to the development of methods for large-scale environmental monitoring and the application of geospatial technologies to ecological and public-health research. He has co-chaired nine The Lancet research reports addressing climate change, health, and healthy cities in China, contributing to the integration of environmental and health perspectives in assessments of urban sustainability. He has authored more than 600 articles and ten books and was the founding Editor-in-Chief of Geographic Information Sciences, now Annals of GIS. He has also served on the editorial and advisory boards of more than ten international journals. His professional activities have included national strategic consulting for the Ministry of Science and Technology and the Ministry of Housing and Urban-Rural Development, as well as participation in international initiatives including The Lancet Countdown. Collectively, his work reflects a sustained research programme connecting geospatial science and remote sensing with the study of environmental change, public health, climate adaptation, and sustainable urban development in China and internationally.