Du Yuming was a famous anti-Japanese general, after graduating from the Whampoa Military Academy, he fought in the National Revolutionary Army's Eastern Expedition to the West, and successively participated in the Northern Expedition, the Great Wall War of Resistance and the Songhu War of Resistance, and in November 1939 he became the commander of the Fifth Army, and later participated in the Battle of Guinan, and severely damaged the Fifth Division of the Japanese Army, known as the "Steel Army".
Du Yuming and his wife Cao Xiuqing had three sons and three daughters, because of rumors that Du Yuming had been executed after being captured in the Battle of Huaihai, Cao Xiuqing took his children to Taipei, at this time the Du family fell into a difficult place, and later it was the old colleagues who helped to intercede, and the children were able to enter the school to study.
Du Yuming's eldest daughter Du Zhili originally attracted Song Meiling's liking, and went to the United States to study, entering the famous American women's college "Weisley College" arranged for her by Song Meiling, but because Du Yuming was captured, the Jiang family changed their attitude towards the Du family, Du Zhili was well aware of the changes in the family, in order to save money, so he transferred to another school that was not very famous.
In Christmas 1949, Du Zhili and yang Zhenning, a former mathematics teacher, were reunited in Princeton, at this time Yang Zhenning had entered the Princeton Institute for Advanced Study for postdoctoral research, and the two met the deceased in other places, the man did not marry the woman, they came together, and the wedding was held the following year.
After completing his studies, Du Zhili also returned to China to work as an English teacher in a middle school, but Yang Zhenning also conducted his research in the United States, and then Du Zhili moved to the United States to take care of Yang Zhenning's diet and living, and worked as a Chinese teacher at the State University of New York at Stony Brook.
Her younger brother Du Zhiren was admitted to Harvard University in the United States in the 1950s, but at this time, the Du family could not afford to let Du Zhiren go to Harvard, but let Du Zhiren give up, Cao Xiuqing naturally felt pity, so he made a loan to the Bank of Taiwan.
But Du Zhiren did not successfully graduate, a year before Du Zhiren graduated, the bank terminated the loan, and Du Zhiren did not know how to understand the family, during the study abroad he also made full use of his spare time to work and make money, but to get a graduation certificate and degree, but there is still a difference of three thousand US dollars.
Cao Xiuqing also raised money everywhere after receiving his son's letter, but 3,000 US dollars is not a small amount, cao Xiuqing had to borrow money from Mr. Jiang, hoping that the other party could remember the old feelings, but Mr. Jiang was only allowed to borrow 1,000 yuan, and it was paid in two years, so Cao Xiuqing only got 500 US dollars.
Du Zhili also wants to help his brother, after all, Du Zhiren graduated from Harvard, the future is immeasurable, not only has the ability to repay the debt, but also to solve the Du family's economic problems, but Du Zhili and Yang Zhenning can not come up with thousands of dollars at once, can only tell Du Zhiren over and over again that they will definitely find a way to raise money.
However, Du Zhiren could not wait, at first he walked into the Harvard campus, thinking that everything would be better and better after graduation, and successful graduation was the driving force for him to continue, as the eldest son in the family, Du Zhiren was under pressure, not only to complete harvard studies, but also the expectations of his mother, the dependence of his younger brothers and sisters, and Du Zhili also took special care of him during the United States, he could not live up to his family, but he fell into the "bottomless abyss" that could not graduate.
The last straw completely crushed Du Zhiren, making him choose to swallow the medicine and commit suicide, Du Zhiren's death was a big blow to the Du family and Yang Zhenning, and in the second year after Du Zhiren's death, Yang Zhenning won the Nobel Prize, and since then Yang Zhenning has become famous, and now is not what it used to be.