On May 15, 2026, the academic community at Fudan University gathered to mark the centennial of the late Gu Chaohao, a mathematician whose influence extended far beyond the abstract realm of numbers. Under the glow of 'Star Gu Chaohao'—an asteroid named in his honor—his former students, now prominent academicians themselves, reflected on a mentor they described not merely as a scholar, but as a 'strategist' of science. Gu’s career was defined by an uncanny ability to anticipate the future intersection of mathematics and national necessity, a trait that helped anchor China’s modern scientific infrastructure.
Born in 1926, Gu’s intellectual development was forged in the crucible of the Second Sino-Japanese War. Joining the Chinese Communist Party at just 14 years old, he balanced underground revolutionary work with rigorous study at Zhejiang University. This early dual identity as both a patriot and a scholar would later define his approach to mathematics, where he viewed the discipline as a 'servant of science' that must solve the urgent problems of the state.
After achieving a doctorate in the Soviet Union—where he was the first to significantly advance Elie Cartan's theory of transformation pseudogroups—Gu returned to a young People’s Republic. Rather than remaining in the comfortable confines of differential geometry, he pivoted to partial differential equations (PDEs) to address the needs of China’s nascent aerospace program. This move was purely strategic: he recognized that the mathematical underpinnings of supersonic flow were critical for national defense and the development of indigenous aircraft.
Perhaps his most famous contribution came in the mid-1970s through a collaboration with Nobel laureate Chen-Ning Yang. While many mathematicians found Yang’s gauge theory too abstract, Gu’s team at Fudan possessed a rare fluency in both geometry and physics. Gu successfully solved the existence of the 'Lorentz gauge,' a problem Yang admitted he had only calculated halfway before hitting a wall. This breakthrough laid the foundation for the mathematical structure of modern Yang-Mills equations and showcased China’s ability to participate in high-level theoretical physics.
In his later years, Gu transitioned from the classroom to institutional leadership, serving as the President of the University of Science and Technology of China (USTC). He championed 'nonlinear science' as the next frontier, fostering an interdisciplinary environment that produced several generations of top-tier scientists. His final act of strategic foresight was the proposal of the 'Southern Mathematics Center' in Shanghai, a vision realized just weeks before his death in 2012, designed to create a triangular research powerhouse alongside Beijing and Tianjin.
Gu’s legacy remains a blueprint for the Chinese scientific establishment: a blend of high-level theoretical rigor and a pragmatic dedication to national development. To his disciples, he was a man who stood on a mountain peak to survey the landscape before descending to clear paths for others. His life reflects the evolution of Chinese science from a state of survival and imitation to one of foundational leadership and global contribution.