1906 10 On February 2nd, Ren Zhigong was born in Hexi Village, Qinyuan. Smart and studious since childhood. He entered a private school at the age of 6, and entered Qinyuan County Primary School at the age of1/kloc-0. /kloc-when he was 0/3 years old, he left his hometown and went to Taiyuan, the provincial capital, to sign up for the preliminary examination in Tsinghua University. But in those days, Tsinghua only recruited one student from Taiyuan. Although he got the second place in the exam, he couldn't get into Tsinghua. So he took the exam in Provincial No.1 Middle School and was initially admitted as a student by Class 20 of the old technical secondary school. Although he only studied in No.1 Middle School for one year, so that he could be admitted to Tsinghua in the second year, he was deeply impressed by the strict school spirit and discipline in No.1 Middle School.

When studying in Tsinghua, Ren Zhigong concentrated on his studies, and his grades were always in the top of Class Three. Not only that, he also paid more attention to the May 4th student movement. According to his memoirs, when he was only 14 years old, he "remembered 1920' s street demonstrations in Beijing and distributed leaflets". "When the Beijing government gave in to the pressure and accepted the students' demands, the crowd cheered." He believes that "the May 4th Movement has a far-reaching influence-that is, the rise of democracy and science in China". 1926, 18 In March, the year when Ren Zhigong was about to finish his studies in Tsinghua, he took part in a general strike of tens of thousands of students in Beijing to protest against strongmen and warlords.

1926 after Tsinghua graduated, ren zhigong chose to go to Cambridge, USA for further study in electrical engineering. In the following six years, he studied at Cambridge Massachusetts Institute of Technology, philadelphia university, Pennsylvania, and Harvard University, and obtained a bachelor's degree in electrical engineering, a master's degree in radio communication, and a doctorate in physics. He also taught at Harvard University and visited many German universities. 1933 After the summer vacation, Professor Ren returned to China via France and Italy and was employed by the Physics Department of Shandong University to teach modern physics, electromagnetic theory of light and elementary quantum theory. The following year, he was hired by Tsinghua University as a professor of physics and electrical engineering.

After the Lugouqiao Incident on July 7th, Professor Ren and Tao got married and both fled to Changsha to teach at Changsha Temporary University in Hunan. Soon he went to Yunnan, where he served as a professor of physical and electrical engineering and director of Tsinghua Radio Research Institute. Until the victory of the Anti-Japanese War, his family moved to the United States, and worked in the applied physics laboratory of Harvard University and Hobbes University successively, until he resigned as the deputy director of the applied physics experiment center, 1 974 retired.

During the 20 years since the late 1940s, Professor Ren has made many pioneering contributions in the field of microwave spectroscopy. He studied the hyperfine structure produced by the coupling of nuclear magnetic moment and molecular rotational magnetic moment by electron spin resonance.

Since the normalization of Sino-US relations, retired Professor Ren has traveled back and forth between the two countries many times. He has taught science and technology courses in many universities in China, and contributed to the education and science and technology of the motherland. He also established the Ren Zhigong Scholarship Foundation in Taiyuan No.5 Middle School, his alma mater as a teenager.