Professor Zhu’s research has centred on the geographical characteristics, development, and conservation of soils and land resources, particularly in Fujian and southern China. He was among the first researchers to identify vertisols in Fujian and conducted systematic studies of their fertility characteristics and agricultural properties, contributing to the understanding and utilisation of soils in tropical and subtropical regions. His broader investigations of soils and land resources in the mountainous areas of southeastern China have informed regional resource assessment and agricultural development. His long-term work in Changting, an area affected by severe soil erosion, examined the interaction between ecological restoration, soil conservation, and regional economic development. On this basis, he developed approaches integrating natural vegetation recovery, soil fertility improvement, and resource utilisation, and proposed a broader strategy linking soil-and-water conservation with regional development. Working with doctoral students and local partners, he also developed models for agricultural resource optimisation and established research and experimental bases in Zhangpu and Changting, integrating teaching, research, and agricultural practice. Professor Zhu has published 17 monographs and more than 130 academic papers, as well as numerous translations. His textbooks Soil Geography and World Soil Geography helped introduce developments in international soil classification into Chinese university and postgraduate education, while Cross-Disciplinary Research on Soil Science and Geography systematised his approach to integrating the two fields. He has led more than ten national and provincial research projects and received numerous awards for scientific research, teaching, and academic publishing. Through sustained research, regional field practice, and long-term contributions to geographic education, Professor Zhu has contributed to the development of soil geography, land-resource science, and interdisciplinary geographic research in China.