Yang Zhenning and Deng Jiaxian are family friends. Yang Zhenning's father Yang Wuzhi was born in Hefei, Anhui. After studying in the United States, he became a professor in Tsinghua University. Deng Jiaxian's father Deng Yizhe was born in Huaining, Anhui. He specializes in art history and studies in America. He was hired as a philosophy professor in Tsinghua University. Hefei and Huaining are not far apart and work in the same school thousands of miles away. The two professors feel cordial and regard them as fellow villagers. Both of them live in the West Campus of Tsinghua Campus, adjacent to each other, separated by a wall, and have a close relationship. Born in 1922, Yang Zhenning is the eldest in the family. Deng Jiaxian is two years younger than Yang Zhenning. She has two sisters. Although they are not brothers, they often play together. Because they are similar in age, they are like brothers. Jiaxian and Zhenning really became friends after they were in middle school. They were admitted to Chongde Middle School, a missionary school run by the British. Zhenning entered school two years in advance. He is brilliant and quick-thinking. He is a "smart card" that teachers and classmates like. Jiaxian is also very smart, but his personality is relatively calm, honest and kind, sincere and reliable. Two friends get together, cherish each other's advantages and regard them as a supplement to their own personality. In their spare time, they are often inseparable, or playing pinball on the ground, or patting by the wall, imitating squash games, or chatting together. When two people get along with each other, it is often Zhenning who tells them what to do and talks eloquently, while Jiaxian is smiling and all ears. Jiaxian's mother is very affectionate and often cooks good meals and sends them to school. At this time, he called Zhenning to enjoy it together. Mother watched them eat all the food before returning to Tsinghua campus. The Lugouqiao Incident, the artillery fire of the Japanese invaders broke their carefree school life, and their friends were forced to separate. Yang Wu's family moved to Kunming, and Yang Zhenning went south with his family. Deng Yizhe, who suffered from tuberculosis and hemoptysis, had to stay in Tsinghua and rented a small room to stay temporarily. Because Chongde Middle School was run by the British, the Japanese did not dare to close it rashly, so Jiaxian continued to study for two years and arrived in Kunming with her sister Deng Zhongxian on 1939.

two

After the fall of Beiping, Tsinghua, Peking University and Nankai all moved to Kunming, Yunnan, and merged in a hilly suburb to form Southwest United University. This institution of higher learning, which was famous all over the country during the Anti-Japanese War, has many famous scholars and professors, which can be described as a collection of talents. Yang Zhenning 1938 was admitted to the Physics Department of The National SouthWest Associated University. After finishing his undergraduate course, he went on to study for a master's degree for two years, so he studied for six years altogether. After Deng Jiaxian 194 1 arrived in Kunming, he was admitted to the Physics Department of National Southwest Associated University, where he studied for 4 years. In this way, they studied in the same school and department for three years. The war disrupted the normal teaching order and created more contact opportunities for Zhenning and Jiaxian. They are three grades apart, but they can stay with each other at any time when they avoid air strikes in the wild. At the beginning, a pair of naughty friends in Chongde Middle School have now become heroic young college students, and their relationship is still harmonious. Zhenning is pregnant with the Lord. In his speeches, he often takes the world as his responsibility, and his classmates jokingly call him "the sky will fall for the Sri Lankan people." Because of his clever mind and quick response, he was nicknamed "Yang Datou". Jia Xian is simple and kind, and his classmates affectionately call him "Deng Laohan" or "Chun". The study life of National Southwest Associated University is very important for Zhenning and jia county all their lives. They learned a wealth of physical knowledge, honed their will and strengthened their friendship. They have personally experienced the pain of the nation being ravaged, and are determined to master advanced scientific knowledge and make their own contributions to the prosperity and strength of the people in the future.

three

1945 After the victory of the Anti-Japanese War, Yang Zhenning was admitted as a public student and went to the University of Chicago to study for a doctorate. After graduating from The National SouthWest Associated University, Deng Jiaxian went north with the school and worked as a physics assistant in Peking University. Later, Deng Jiaxian also obtained a postgraduate degree in the United States. Before going to America, he wrote to Zhenning to ask which American university is more suitable. After careful consideration, Zhenning suggested that Jia go to Purdue University in Indiana for further study. The reason is that the school is close to Chicago, and the two can meet often; Secondly, Purdue University has a high level of science and engineering, ranking among the 65,438+00 universities of science and technology in the United States, with low fees and easy economic guarantee.

Jia first adopted Zhenning's suggestion. At this time, Zhenping, Zhenning's younger brother, was going to the United States to go to college, so Yang's father entrusted Zhenping to jia county, and they went hand in hand and arrived in San Francisco on 1948. Jia Xian sent Zhenping to Zhenning, Chicago. Then go to Purdue University. After the end of World War II, with the rapid development of world science and technology, people realized the importance of nuclear physics, and nuclear physics became a hot subject in the world. Jia Xian and Zhenning realized that mastering this subject is the only way to reach the forefront of science. Both of them chose theoretical physics as their major, theoretical nuclear physics as their minor subject, and their doctoral thesis also belongs to the category of nuclear physics. 1949 summer vacation, Jia came to Chicago for the first time to reunite with Zhenning and Zhenping. The three people rent a house together, play, walk and chat together, share childhood scenes and discuss academic issues. This is their longest and most enjoyable party in America. In the home of Zhenning and Jiaxian, the photos they took at that time are still preserved. Zhenning has obtained a doctorate and is about to apply for a job at Princeton College. Later, he married the daughter of Mr. Du, who studied in the United States, and settled in the United States to engage in scientific research in theoretical physics. Jia Xian is writing a doctoral thesis at this time. As early as when I was studying in The National SouthWest Associated University, Jia first accepted China's influence. He has several important classmates, all of whom are underground party member.

After the news of the birth of New China reached the other side of the ocean, Deng Jiaxian's mood could no longer be calm. 1950 On August 20th, Deng Jiaxian completed her studies and received her doctorate. He broke through many obstacles, boarded the ship President Wilson, and set foot on the journey back to China on August 29th. During their study in the United States, Zhenning and Jiaxian both received their doctorates within two years. They all mastered the frontier theoretical nuclear physics science in the world at that time, which laid a solid foundation for their outstanding achievements in the future.