Qian Zhi, Qian Mu's eldest brother, has been teaching in his hometown all his life. He has a great son, the famous scientist Qian Weichang. Qian Zhi died young, and Qian Weichang was raised by his uncle Qian Mu. After Qian Mu's death in Taipei, Taiwan Province authorities banned Qian Weichang from entering the country. Therefore, Qian Weichang sent an elegy to express his nostalgia and gratitude to his uncle: "My parents gave birth to me, and my parents gave me a good uncle. Let's count the past from the beginning, and I will be grateful for it. " "The public is a teacher and the family is an elder. It is a past tense, and the legacy is sad."
Qian Weichang has been insisting on physical exercise since college. During his stay in Tsinghua, he was already the main left striker of the college football team. 1937 was selected for the Chinese national football team and participated in the Far East Games held in the Philippines. Seventy-year-old Qian Weichang takes long-distance running as a form of exercise. After ninety years old, he still insists on walking three thousand steps every day. He participated in the establishment of the Department of Mechanics in Peking University-the first major of mechanics in China University; As an educator, Qian Weichang recruited the first batch of mechanics graduate students after the liberation of China, and put forward a complete, rich, systematic and scientific theory of China's higher education, which made outstanding contributions to China's higher education theory. He put forward the idea of "knocking down four walls"; Adhere to the "three systems" (credit system, course selection system and short semester system); Pay attention to cultivating students' scientific and humanistic thoughts; Advocate harmonious education thought and aesthetic education thought.
Qian Weichang was a minor in mathematics and physics in middle school. He only got 5 points in physics, 20 points in mathematics and chemistry, and 0 points in English because he had never studied it. On September 193 18, Japan launched the "September 18th Incident" which shocked China and foreign countries. After hearing the news on the radio, Qian Weichang said angrily, "I'm not going to study history. I'm going to learn to build aircraft and artillery, and I decided to transfer to physics to revitalize China's military strength.