Chen Jingrun is a famous mathematician in China. He doesn't like going to the park and walking, but studying. When he studies, he often forgets to eat and sleep.

One day, when Chen Jingrun was having lunch, he touched his head and found that his hair was too long. He should get a haircut quickly, otherwise people will think he is a big girl when they see him. So he left work and ran to the barber shop.

There are so many people in the barber shop that everyone cuts their hair next to each other. Chen Jingrun got brand number 38. He thought, it's still early for me to turn around. Time is so precious that I can't waste it. He hurried out of the barber shop, found a quiet place to sit down, then took out a small notebook from his pocket and recited new words in a foreign language. He recited it for a while and suddenly remembered that when he was reading a foreign language in the morning, there was one place he didn't understand. You must understand what you don't understand. This is Chen Jingrun's temper. He looked at his watch. It's only half past twelve. He thought: check in the library first, and then come back for a haircut. He stood up and left. Who knows, not long after he left, it was his turn to get a haircut. The barber shouted, "Number 38! Who is number thirty-eight? Come and get a haircut! " Think about it. Chen Jingrun is reading in the library. Can he hear the barber calling number 38?

After a long time, Chen Jingrun found something he didn't understand in the library, and then went to the barber shop happily. But when I passed by the foreign language reading room, I found all kinds of new books, which were really nice. So he ran in and watched it again. It was not until the sun went down that he remembered the haircut. As soon as he touched his pocket, the little sign No.38 was still lying well. But what's the use of his coming to the barber shop? This number is outdated.

That's how Chen Jingrun worked selflessly. He works in a dormitory of six square meters, lifts bedding and calculates on the bed board; When the power went out, he lit kerosene lamps to burn the midnight oil.

Where there is a will, there is a way. 1973, Chen Jingrun finally broke through the difficulty of (1+2), and his thesis gained an absolute leading position in the exploration of Goldbach's conjecture. At this point, human exploration of Goldbach's conjecture is only one step away from the "crown jewel" (1+ 1).

An English mathematician wrote to congratulate Chen Jingrun and said, "You have moved all the mountains!"

What a price this "contemporary foolish man" paid for moving mountains!