His name has been secret for 28 years.

Before it was reported by the media in 1988, few people knew who Yu Min was, and even fewer people knew what he was doing. Even his wife Sun Yuqin said: "I didn't expect Lao Yu to do such a high-level secret job."
Yu Min engaged in "high-level secret work" is the research of hydrogen bombs and nuclear weapons.
Yu Min's scientific research career began at the Institute of Modern Physics, where the famous physicist Qian Sanqiang was the director. After studying in the field of nuclear theory for many years, Qian Sanqiang talked to him in 1961 and gave him the task of exploring hydrogen bomb theory. From then on, Yu Min turned to study the principle of hydrogen bomb and began 28 years of anonymity.
The nuclear powers at that time kept their research on hydrogen bombs absolutely secret, and our country started completely from a blank sheet of paper. Because large computers are very nervous, in order to speed up the research, Yu Min and his team are almost always immersed in a mountain of data calculations. In September 1965, the "Hundred Days Battle" in Shanghai finally broke the deadlock: Yu Min, with extraordinary intuition, sorted out the clues from a large number of dense and chaotic data, and led the team to form a basically complete hydrogen bomb theory. Design plan.
However, the design still needs to be tested by nuclear tests. The Northwest Nuclear Weapons Research and Development Base is located on the Qinghai Plateau. There, researchers eat steamed buns mixed with sand and drink bitter-alkali water. The vast Gobi flies sand and rocks. The strong wind is like a knife cutting. In winter, the temperature is as low as minus 30 degrees Celsius. The road is frozen like a washboard. Yu Min's altitude sickness is very strong, tasteless food and sleepless. It is only a hundred meters from the dormitory to the office. Sometimes he has to rest and vomit several times. Even so, he insisted on solving the problem before leaving the base.
In June 1967, my country's first hydrogen bomb was successfully tested in an air-dropped explosion, and China became the fourth country in the world to possess a hydrogen bomb. From the explosion of the first atomic bomb to the successful test of the first hydrogen bomb, it took more than seven years for the United States and only two years and eight months for China.
In 1969, Yu Min led a team to study nuclear weapons in the mountains of Mianyang, Sichuan. He judged that "nuclear weapons have entered a new stage. If we lose our deterrent capability, we will be subject to nuclear blackmail again".
He did not dare to stop his steps. But after working in a difficult environment for a long time, his body became weaker and weaker, and he had passed by death many times.
In early 1969, during the first underground nuclear test and large-scale air explosion heat test, Yu Min had to lift his leg with his hand to go up the steps slowly. His colleagues advised him to rest. He insisted on going to the hill to observe the fireball. Due to overwork, he nearly went into shock at the job site. Late one night in October 1971, Yu Min went into shock again due to overwork......
In January 2015, 89-year-old Yu Min won the 2014 National Highest Science and Technology Award. He was in a wheelchair, his wispy hair, his humble and peaceful face. The last time he made such a "public appearance" was in 1999. At the conference of scientific and technological experts who made outstanding contributions to the development of "two bombs and one satellite", he was awarded the "two bombs and one satellite" meritorious medal and spoke on behalf of 23 award-winning scientists. For Yu Min, he is not used to such occasions. In those years of anonymity, he "sank" in the depths and felt at ease. On January 16, 2019, Yu Min died at the age of 93.
　　                       

(From People's Daily, January 6, 2021)