Chen Jingrun became an internationally renowned mathematician and was deeply respected by people. However, instead of being complacent, he attributed all the credit to the motherland and the people. In order to safeguard the interests of the motherland, he did not hesitate to sacrifice his personal fame and fortune.

1977 One day, Chen Jingrun received a letter from the president of the International Federation of Mathematicians, inviting him to attend the International Congress of Mathematicians. There are 3000 people present at the conference, all of whom are world-famous mathematicians. The Congress * * * designated 10 mathematicians to give academic reports, and Chen Jingrun was one of them. This is a great honor for a mathematician and will improve Chen Jingrun.

Chen Jingrun didn't make a good claim, but immediately reported to the party branch of the institute and asked the party for instructions. The Party branch reported the situation to the Academy of Sciences again. The Party organization of the Academy of Sciences was cautious about this issue, because China's seat in the International Federation of Mathematicians had been occupied by Taiwan Province Province at that time.

The leader of the hospital replied: "You are a mathematician, and the party organization respects your personal opinion. You can write back to him yourself. "

After careful consideration, Chen Jingrun finally decided to give up this rare opportunity. In his reply to the president of the International Federation of Mathematicians, he wrote: "First, China has always attached importance to developing academic exchanges and friendly relations with countries around the world. Personally, I am very grateful to the President of the International Federation of Mathematicians for his invitation. Second, there is only one China in the world, and the only people who can represent the interests of the broad masses of people in China are the people of China and China. Taiwan Province Province is an inalienable part of the people of China. At present, Taiwan Province Province occupies the seat of the International Federation of Mathematicians in China, so I can't attend. Third, if China has only one representative, I can consider attending this meeting. " In order to safeguard the dignity of the motherland, Chen Jingrun sacrificed his personal interests.

During the period of 1979, Chen Jingrun went to the United States for a short-term research visit at the invitation of Princeton Institute for Advanced Studies. The conditions at Princeton College are very good. In order to make full use of such good conditions, Chen Jingrun squeezed out all the time he could save, worked hard and didn't even go back to his place to eat lunch. Sometimes he goes out to attend meetings, and the hotel is noisy, so he hides in the bathroom to continue his research work. Because of his efforts, in a short period of five months in the United States, in addition to attending meetings and lectures, he also completed the paper "The Minimum Prime Number in arithmetic progression", which pushed the minimum prime number from 80 to 16 at once. This research result was also the most advanced in the world at that time.

In a relatively developed country like the United States, Chen Jingrun still maintains a frugal style at home. He can get 2000 yuan from the institute every month, which is quite generous. Every day at noon, he never goes to the institute's cafeteria to eat, where he can enjoy it, but he always eats his own dry food and fruit. He is very frugal. He lived in the United States for five months, and spent a total of 6,500 yuan excluding rent and utilities.

The money was not a small sum at that time. He could have bought some high-end home appliances from abroad like others, but he gave them all to the country. What does he think? In his own words: "Our country is not rich, so I can't just think about pleasure."

Chen Jingrun is such a very modest and upright person. Although he has made a name for himself, he is not complacent. He said: "I just climbed a hill on the road of science and haven't climbed the real peak yet." I have to keep working hard. "