Academician Yu Min is the chief contributor to the China's breakthrough in the principle of hydrogen bombs. He is also an important engineering management expert and strategic consulting expert in the field of research and development of nuclear weapons in China. In the long-term work on the national defense research and management, he forms a unique style of national defense scientific research， such as the pursuit of national defense for a lifetime, a clear orientation towards the military demands, the focus on practical problems in national defense, a solid foundation in research, and the materialistic dialectical thinking through the science research.