1, Yu Min's absolute secrecy about his career. Don't reveal anything related to work.

Yu Min remained anonymous for a long time. Yu Min first buried himself in a mountain of computer paper tape, and then made an intensive report. Finally, a series of basic problems in the breakthrough of China's hydrogen bomb principle were solved, and the idea of basic integrity from principle to configuration was put forward, which played a key role.

Since then, he has led the theoretical research and design of nuclear weapons for a long time and solved a lot of theoretical problems. It has made important contributions to the further development of China's nuclear weapons to the international advanced level. Since 1970s, it has played an important role in advocating and promoting the research of some high-tech projects. 1982 won the first prize of National Natural Science Award.

Yu Min has never been abroad. He is almost the only authoritative physicist who has never studied nuclear weapons. Yu Min almost started from a blank sheet of paper, relying on his own diligence to make theoretical exploration by analogy.

From atomic bomb to hydrogen bomb, according to the time comparison of breakthrough principle test, it took Americans 7 years and 3 months, Britain 4 years and 3 months, France 8 years and 6 months, and the former Soviet Union 4 years and 3 months.

One of the main reasons is the complexity of calculation. At that time, China's equipment was unparalleled. At that time, there was only one electron tube computer with 10,000 times per second, and 95% of the time was allocated to the calculation of atomic bombs, leaving only 5% of the time for Yu Min to design hydrogen bombs.

Yu Min's memory is amazing. The working group under his leadership has a slide rule and forgets to eat and sleep. Over the past four years, Yu Min, Huang Zuqia and other scientific and technological personnel have published 69 reports on research results, which have deeply understood many basic phenomena and laws of hydrogen bombs.