Professor Song’s research has focused on control theory, systems engineering, and aerospace technology, with particular emphasis on optimal control, filtering theory, and the application of systems approaches to complex engineering systems. His research in control theory and systems engineering has included work on optimal control and control-theoretic approaches to large-scale systems, while his professional career also involved the development and organisation of research programmes in aerospace and related areas. He participated in the formulation and implementation of major national science and technology programmes and contributed to the development of science and technology policy during the period of reform and opening-up. His research and professional work have been documented in numerous monographs and scholarly publications. Through sustained engagement in research, engineering leadership, academic administration, and science and technology policy, Professor Song has contributed to connecting advances in control theory and systems engineering with applications in aerospace technology, large-scale engineering systems, and the organisation and development of scientific research.