Group 1 - Zhang Chuhan, a prominent figure in water conservancy and hydropower engineering, has made significant contributions to major projects in China, including the Three Gorges Dam and the South-to-North Water Diversion Project [2][34]. - He has been instrumental in developing seismic design theories for high arch dams, which are now widely recognized and applied in various engineering projects [21][34]. - Zhang's work has been pivotal in ensuring the safety and effectiveness of high dam constructions in seismically active regions of China, addressing challenges posed by natural disasters [21][28]. Group 2 - Zhang Chuhan's educational background includes studying at Tsinghua University, where he excelled in mathematics and physics, laying a strong foundation for his future work [9][10]. - He was among the first group of scholars to study abroad after the reform and opening-up, gaining exposure to advanced water management technologies [12][34]. - Throughout his career, Zhang has emphasized the importance of innovation and continuous learning, adapting to new technologies such as artificial intelligence in his research [33][34]. Group 3 - At 92 years old, Zhang continues to actively participate in research and education, demonstrating a commitment to mentoring the next generation of engineers [35][36]. - His contributions to national water safety governance, particularly in projects like the Xiong'an New Area, highlight his ongoing influence in the field [29][34]. - Zhang's philosophy of "work keeps one young" reflects his dedication to lifelong learning and engagement with contemporary issues in water management [35].