"Learning is difficult, but diligence is very important." 1955, Chinese mathematician Zhang, born in Pinghu, Zhejiang, was born in Shanghai. His birth brought infinite happiness to the Zhang couple. His parents cherish him very much, and his family is very rich. The father of an electrical engineer and the mother of an institution have devoted themselves to cultivating Zhang, and Zhang has lived up to expectations, showing strong learning ability since childhood. In his "all over the sky" learning ability, mathematics stands out. As a talented player, Zhang not only has amazing talent, but also has strong self-discipline ability. In the study of mathematics, he works very hard and studies hard. Before I was 9 years old, I finished the long-distance running from primary school to high school ahead of schedule and began to conquer college mathematics courses. It can be said that it is a typical representative of the children next door, or the kind that won a lot at the starting line.

However, it seems that God is born to like the dog blood bridge that "God will drop his post to Sri Lanka, and he must first suffer his ambition". It stands to reason that Zhang Hui, who has such amazing talent and a well-off family, has a bright future, and so do teachers, classmates, relatives and friends around him, but life is not satisfactory. 1968, when Zhang 13 years old, Zhang's mother was sent to the farm. Because of this sudden change, Zhang had to give up his studies and follow his mother to work on the farm, which missed the precious opportunity to continue his systematic study.

The reason why a genius is a genius lies in his greatness, and Zhang's uniqueness lies in his persistent research on mathematics for decades. In the past few years, Zhang has never neglected his study of mathematics, and he can often be seen reading books in his spare time in the sheepfold and cowshed on the farm.

Those who persist will be luckier than others, and the lucky brush will eventually ignite on Zhang's life drawing paper. A few years later, Zhang returned to the city with his mother, during which he never stopped studying mathematics. 1978, 23-year-old Jackie Zhang was admitted to Peking University to study mathematics professionally and systematically. 1985 was invited by Mo Zongjian to study in the United States and became a foreign student at Purdue University.

1982 After four years of university study, Zhang ushered in the graduation season. However, because his previous paper quoted a famous mathematical conclusion of his tutor Mo Zongjian, which was later proved to be wrong, his relationship with his tutor deteriorated. In addition, with the disintegration of the Soviet Union at that time, a large number of mathematicians poured into the United States, so young Zhang faced the frustration of Adventure Island.

In order to survive in America, Zhang had to help wash dishes in the canteen. Later, his classmates and friends in Peking University learned of his plight and urged him to return to China to become a professor, but Zhang Yida flatly refused. He was enthusiastic at that time, thinking that he could wash dishes in the United States and become a professor at a prestigious school after returning home. He was afraid that his alma mater's reputation would be damaged, so he wrote to decline the invitation of his friends.

Pearls are not always dusty. With the help of friends in Peking University, Zhang worked as a lecturer in calculus in an unknown university. It was also during this period that he gained the second highland of his own mathematical research. In July 20 12, he published Bounded Distance between Prime Numbers, which shocked the academic circles.

In the third year after that, on 20 15, Zhang Cheng became a tenured professor in a famous American university, which opened a new chapter in his life. After he became famous, people who knew his past asked him why he would rather wash dishes in America than go back to China to be a professor. At this time, Zhang gave a completely different answer, "If I had been in China, I wouldn't have achieved so much". It is also because of this sentence that he is widely criticized, but everyone who knows him knows that he refers to his mentality in mathematics learning. If he had returned to China, his enthusiasm and confidence in mathematics study and research would have stopped long ago, and he would not have made such great achievements.

It is true that caring for the motherland and being determined to serve the country seems to be everyone's definition of patriotism, but some fields are owned by human beings, such as mathematics, which is the crystallization of human wisdom.