On this day, 34 years ago, November 19, 1991 (October 14, 1991 in the lunar calendar), Chinese-American physicist Wu Jianxiong won the Puping Medal. Wu Jianxiong was born in Taicang County, Jiangsu Province in 1912 and received a doctorate from the University of California, Berkeley in 1940. In 1956, she experimentally verified the argument that the weak interaction of electrons and their mirror images are not always symmetrical to each other. This experiment shocked the world's physics community. Currently, Dr. Wu Jianxiong is an honorary professor of physics at the University of Colombia. Due to her outstanding contributions to academic research, she has been awarded honorary doctoral degrees from 16 universities around the world. In recognition of Professor Wu Jianxiong's outstanding contribution in the field of physics, on November 19, 1991, the University of Colombia awarded her the Puping Medal, which represents a high honor in the scientific and engineering community. The Consul General of the Consulate General of China in the United States hosted a grand banquet to celebrate Wu Jianxiong, a great contemporary Chinese female physicist, winning the Puping Medal. At the reception, a piece of inside news that had been kept for more than 50 years broke out: the research results of Wu Jianxiong's doctoral thesis while studying in the United States enabled the United States to successfully trial-produce its first atomic bomb. During the Second World War, American scientists discovered that when atomic nuclei split, powerful energy was generated. If used, an atomic bomb hundreds of thousands of times more powerful than ordinary bombs could be created. President Roosevelt ordered $2 billion to establish an atomic bomb research institute codenamed the Manhattan Project. In 1939, two physicists in the United States concluded after research that "the uranium nucleus may split into two and release a large amount of energy at the same time." This information quickly reached the University of California, Berkeley, raising many questions that needed to be answered. At that time, Wu Jianxiong happened to be working with Professor Segri at the school to do experiments and research work. Professor Segeri suggested examining whether "rare gases" are produced when uranium nuclei split. But at this time, Professor Segri was going to New York to visit his old friend Professor Fermi. Wu Jianxiong conducted a separate study to detect "whether rare gases are produced by the splitting of uranium nuclei" and found out the radioactive series caused by several "rare gases". She wrote the research results into her doctoral thesis. After Professor Segri returned to California, he was very excited to see Wu Jianxiong's experimental results. He immediately asked her to write these experimental results into a short message and send them to the American Physics Bulletin for publication. The detailed experimental report was not published in accordance with the relevant U.S. confidentiality agreement. During this period, Professor Fermi, commander of the Manhattan Project, built the atomic furnace in Hanford City, Washington. The continuous reaction in the atomic furnace inexplicably stopped a few hours after the first. Professor Fermi speculated that when the atom split, a substance was created that absorbed most of the neutrons, thus stopping the chain reaction. Professor Segri said to Fermi: "Go and ask Ms. Wu Jianxiong!" Fermi found Wu Jianxiong and obtained his doctoral thesis on keeping secrets. It turned out that the reason why the atomic furnace stopped was precisely one of the "rare gases" found when studying atomic nuclear division in Wu Jianxiong's doctoral thesis, which poisoned the chain reaction. Knowing the reason why the atomic furnace stopped, it was easy to find the "antidote" and get the atomic furnace to start operating normally again. As a result, the first atomic bomb was finally successfully trial-produced in the United States.