Professor Liu’s research has centred on GIS theory, methods, and analytical models, with particular emphasis on professional GIS software development, land-use change modelling, and the application of geospatial technologies to natural-resource management and urban planning. Through leadership of national major research programmes and participation in international scientific collaboration, he has contributed to the development of GIS theory, spatial data analysis, land information systems, and geospatial applications in China. His research has addressed the theoretical and methodological foundations of GIS as well as the development and application of software and analytical tools for land-use and spatial planning. Author of numerous peer-reviewed publications and monographs, he has received multiple national and ministerial science and technology awards. Through sustained research, academic leadership, and international collaboration, Professor Liu has contributed to connecting advances in geographic information science and GIS engineering with practical applications in land-resource management, urban planning, spatial information services, and sustainable regional development.