The train driver in the courtyard

Hearing the familiar voice, Chen Zilan felt a little surprised: "Why is Professor Cheng here?"

There was silence in the house.

Professor Hua looked at Chen's information.

Chen Zilan looked at Professor Hua and then at Li Aiguo, then he realized that he was an orderly.

But I’m your senior brother.

Isn’t this rebellion against Tiangang?

What?
Junior fellow student proved the Poincare conjecture?

Hey, this is really my good junior brother!
Chen Zilan quickly stood up and went to open the door.

When I opened the door, I saw a middle-aged comrade wearing a navy blue Zhongshan suit standing outside. He should be the Professor Cheng mentioned by Chen Zilan.

There was another comrade who was a little older following behind him.

As soon as he entered the door, Professor Cheng was about to greet Professor Hua, but he saw Li Aiguo sitting on a chair. His eyes lit up and he hurried forward to ask.

"You proved the Poincare conjecture?!"

Li Aiguo looked at Professor Cheng, who was very excited, and nodded: "Yes, but it is only part of the Poincare conjecture."

Professor Cheng was about to say something when the old man standing next to him spoke first.

"Heroes emerge young. After all these years, our domestic mathematics community has finally produced a genius mathematician who can rival Kodaira Kunihiko."

A genius mathematician?
Kunihiko Kodaira?

Li Aiguo looked confused.

However, Chen Zilan was stunned again at this moment, with an unprecedented shock appearing on his face.

Kunihiko Kodaira!

He is the winner of the last Fields Medal, a foreign member of the National Academy of Sciences of China, and a foreign member of the Academy of Arts and Sciences of China!

This junior brother who has just joined the team is quite powerful.

No, no, I have to try harder and get the 1+2 certificate as soon as possible.

Professor Hua saw Chen's information and coughed twice: "Xiao Chen, pour some water."

Xiao Chen? Chen felt a little aggrieved.

In the past, teachers always called him Comrade Chen Ziran, but now it has become Xiao Chen.
Chen Zilan silently picked up the thermos and went to pour tea.

The middle-aged man in his fifties smiled and said, "Lao Hua, don't be polite. We still have work to do and we have to leave soon."

Professor Cheng also nodded: "There is still a lot of work to do in the department."

After Professor Hua exchanged a few pleasantries with them, he remembered that Li Aiguo did not know them. He pointed at the middle-aged man and introduced him, "This is Professor Cheng, the deputy director of the Department of Mathematics at Jingcheng University, and also the director of the Mathematical Analysis and Function Theory Teaching and Research Section."

When he heard the other party's background, Li Aiguo's expression changed a little.

Although Professor Cheng is only a deputy director, he is the real founder of the Institute of Mathematics at Beijing University.

Professor Cheng not only has many achievements in academics, but more importantly, he has excellent management skills and is the leader of the Department of Mathematics at Jingcheng University.

He was later regarded as "a master of domestic mathematics".

Li Aiguo came back to his senses and immediately stood up: "Hello, Director Cheng."

"You're welcome. You should call me Professor Cheng, or Old Cheng." Professor Cheng looked at Li Aiguo and nodded approvingly: "Your paper has set a precedent in China and has greatly boosted the confidence of domestic mathematical researchers. I want to thank you."

At the end, Professor Cheng said with emotion: "It is true that heroes emerge from youth. We old comrades are no longer capable of this. The future development of mathematics in China still depends on you young people."

"Professor Cheng, your words are too serious." Li Aiguo was a little embarrassed. "Professor Cheng, you may also know that this paper is not the credit of me alone, but the result of a collective effort."

"Haha" Professor Cheng smiled.

Huh? What does this mean?
Li Aiguo was a little confused.

As an old mathematician, Professor Cheng must know that when it comes to mathematics, the more people there are, the less progress you will make.

At this time, Professor Hua saw that the two had finished chatting, and pointed to the comrade in his fifties next to him and introduced him: "This is Professor Su, the head of the Department of Mathematics at Aurora University. Professor Su has deep insights in geometry.

Patriotism, if you have time, you can ask Professor Su for advice. "

Professor Su, the founder of the differential geometry school, Li Aiguo took a deep breath again.

This is Professor Su, who is as famous as Professor Hua.

Today, all the big guys are here
"Hello, Professor Su." He greeted quickly.

Professor Su was more like a mathematician than Professor Cheng. He had a very cold attitude. He looked Li Aiguo up and down, nodded, and said, "Very good."

Then he asked directly: "Comrade Li Aiguo, how is your next work going?"

"Next step?" Li Aiguo hesitated.

Professor Su frowned and looked at him, then raised his head and looked at Professor Hua: "Old Hua, please don't tell me that your Institute of Mathematics and Computing didn't cooperate with Comrade Li Aiguo to continue to tackle the Poincare conjecture!"

When Professor Hua heard this question, he opened his mouth, not knowing how to explain.

Can he tell Professor Su that Li Aiguo is now tinkering with computers?

Li Aiguo stepped forward and said with a smile: "Professor Su, I have a lot of work to do at the moment, and I haven't started any follow-up research yet."

Professor Su frowned: "You are a train driver, right? That's nothing. Your occupation cannot predict your future achievements.

Lao Hua is a junior high school graduate, and Andrei Kolmogorov studied history.

As long as you are proactive and focus on research, your future will be limitless given your talent."

"Yes, yes, you are right."

After being taught a lesson by a big shot of this level, what else could Li Aiguo say but to nod his head repeatedly.

Li Aiguo looked around and said with a smile, "It's getting late. I have children at home who need to be taken care of. I have to go back first."

"You." Professor Su wanted to say more, but Professor Hua came to Li Aiguo's rescue: "Go back quickly. Your wife is pregnant. Please take care of the family more recently."

"Goodbye then!"

Professor Su was notoriously strict, so Li Aiguo did not dare to stay any longer and quickly retreated, closing the office door when he left.

Looking at Li Aiguo's actions, Professor Cheng smiled and said, "This kid is a talent."

Professor Su sighed: "Yes, he didn't focus on mathematics at all. Instead, he became a train driver. This is not... not..."

Professor Su didn't know how to describe his feelings for a moment.

"It's good to be a train driver." Professor Hua narrowed his eyes and said something meaningful.

"Good? Comrade Aiguo's mathematical talent is the highest I have ever seen in all these years. As long as he calms down and studies, a great mathematician will appear in our country in a few years." Professor Su frowned.

"Lao Su, you misunderstood me. Being a train driver and doing mathematical research are not in conflict." Professor Hua reminded him, "There is a saying that goes, 'come from labor, go to labor.'"

Seeing that Professor Su and Professor Cheng both looked thoughtful, Professor Hua felt that he should remind his two old friends.

He glanced at Chen's profile and said, "Xiao Chen, it's late, you should go back first."

Chen Zilan felt that someone had finally noticed him, the forgotten person, and left the office happily.

After the door was closed, Professor Hua continued: “Scientific research is not for satisfying curiosity, having fun, discovering the beauty of nature, or the supreme glory of the human mind.

Scientific research always serves social production and improves people's lives.

We researchers receive government subsidies and allowances, and live a comfortable life. We cannot just focus on our own business. "

Professor Su always felt that there was some meaning behind Professor Hua's words, but he couldn't figure it out for a moment.

He always felt that wasting his talent on driving trains was irresponsible to himself and the country.

Professor Cheng was much more conscious of rectification than Professor Su, and he had also heard some rumors. He smiled and nodded, "It seems that Comrade Li Aiguo has really chosen a good path.

The students at our Jingcheng University in Beijing are in need of education from the workers. If there is a chance, we will invite patriotic comrades to give lectures. At that time, we will need you, Lao Hua, to act as a matchmaker."

"No problem, no problem. I understand Aiguo. He is different from ordinary workers. He still respects professors."

The three of them looked at each other and smiled.

Professor Hua hopes that Li Aiguo can launch a satellite for the Beijing Institute of Mathematics and Computing.

Professor Cheng hopes to be able to put the label of Capital University on Li Aiguo.

Professor Su only hopes that Li Aiguo can go further and further on the road of mathematics and solve more difficult mathematical problems.

Inside the office, the three people had different thoughts.

But the starting point is to boost the confidence of domestic mathematics researchers and to gain more voice for the domestic mathematics community in the international arena.

No one has any selfish motives.

****
Li Aiguo was also aware of this. On the way back to the courtyard on his bicycle, he began to recall the details related to the Poincare conjecture in his previous life.

When I got home, although I couldn't remember the specific details, I came up with the idea of ​​proof.

If necessary, it only takes a little time to prove it.

But Li Aiguo couldn't care less about that now and tiptoed into the bed.

Chen Xueru woke up from her sleep and smelled the scent of the rough man. Without opening her eyes, she threw herself into Li Aiguo's arms.

Li Aiguo looked at Xiao Hongsheng who was sleeping soundly beside him and smiled.

This is what it means to have a wife, children and a warm bed.

Lights went out.

The person is asleep.

In the following days, Li Aiguo was busy with the production of general-purpose minicomputers at the Red Star Computing Institute, while at the same time he went to the Beijing Computing Institute to discuss the follow-up proof of the Poincare conjecture with Professor Hua.

After all, proving a problem halfway is like doing half of a health check, which makes people feel uncomfortable.

After Professor Cheng from Jingcheng University learned about it, he also joined in.

Li Aiguo also accompanied Professor Cheng to visit Beijing University and had a great chat with the mathematics masters of that time.

Time passed little by little.

Before I knew it, five days had passed.

Professor Cheng arrived at the Beijing Institute of Mathematics and Computing early in the morning, but did not see Li Aiguo.

"Lao Hua, where is Aiguo? I have some idea of ​​what we discussed yesterday, but where is he?"

Professor Hua looked at Professor Cheng, who looked anxious, and said with a smile, "He can't come today."

"Why? Is there anything more important than solving a puzzle?"

"Uh, his wife gave birth to a baby."

"." Professor Cheng thought it was not an important matter, but he did not say it. This matter has to start from last night.

Yesterday at midnight, Chen Xueru suddenly had a stomachache and was sent to the Obstetrics and Gynecology Department of the Railway Hospital. After examination, the doctor determined that it was time for Chen Xueru to give birth.

Having a child is like playing a game, once is new, twice is cooked.

This is Chen Xueru’s second child, and she is much more relaxed than the last time.

In particular, she was not lacking in nutrition, was in good health, and the delivery process went smoothly.

Li Aiguo, Chen Fangxuan, the eldest sister-in-law, Aunt Liu, and He Yushui waited in the corridor for two hours, and then a clear cry was heard from the delivery room.

After a while, the doctor and the nurse pushed Chen Xueru out of the delivery room.

"It's a little girl!" Li Aiguo was delighted when he saw the pink and tender little face. He walked over, took Chen Xueru's hand, and thanked her, "Wife, thank you for your hard work."

Chen Xueru touched her little girl, with a happy smile on her face: "Brother Aiguo, look at what you said, we are a family."

Aunt Liu congratulated him and said, "You are so patriotic. You now have both a son and a daughter."

****
Chen Xueru's physical recovery speed this time was much faster than last time. She only rested in the hospital for a while before going home.

Li Aiguo asked Zhou Ke to drive the GAZ jeep from the locomotive depot over, took Chen Xueru with him, and the group returned to the courtyard.

When the third uncle saw Li Aiguo holding a child from the jeep, he quickly came up and said with a smile: "You're back so soon. I was planning to go to the hospital. Oh, it's a little girl. What a delight. Aiguo, congratulations."

Li Aiguo bowed to the third uncle and said, "Third uncle, I'll come over to give you wedding candy later."

"That's great." Seeing that Li Aiguo was about to leave, the third uncle took a few quick steps and held Li Aiguo's arm: "Aiguo, naming a child is a big deal, especially for girls. You have to be more cautious. If you need it, I can find a few names for you for free."

When it comes to naming, Li Aiguo feels indignant.

The name Li Hongsheng is so good, easy to remember and has a good meaning.

But the third uncle thought it was too vulgar and kept nagging Chen Xueru.

However, the names commonly used by lesbians these days - Cuihua, Hongmei, Dahong, Gangdan, Gangzhu, Tiedan, Tiezhu - are indeed a bit vulgar.

Li Aiguo thought about it and agreed immediately: "Uncle, thank you for your help."

"Hey, what's the relationship between our two families? You're too polite." Looking at Li Aiguo leaving with the child in his arms, the third uncle adjusted the frame of his glasses.

When Li Aiguo sends out wedding candies later, he should give at least two more pieces.

If I, Yan Bugui, had not been born, the IQ of the people in the courtyard would have dropped significantly.

Qin Huairu was washing clothes in the middle courtyard at this time. When she saw Li Aiguo and Chen Xueru coming back, she greeted them with a smile.

"She's a girl. Girls are like little cotton-padded jackets. Look, my little Dang is so well-behaved. Aiguo, if you need anything, just let me know."

Knowing that the Li family has everything they need, he deliberately said these words in front of everyone.

This is what cheap talk is.

Li Aiguo and Chen Xueru were in a good mood. They greeted Qin Huairu with a smile and went back.

When Jia Dongxu learned that Chen Xueru had given birth to a daughter, he secretly breathed a sigh of relief and said proudly: "I have a son and a daughter, and Li Aiguo also has a son and a daughter. Haha, Li Aiguo and I are almost the same."

Qin Huairu: "."

She was silent for a moment, and reminded Jia Dongxu: "Isn't Master Yi going to entertain guests today? Go and help."

"Hey, that guest seems to be a great scholar. Master Yi reminded me of this yesterday, how could I have forgotten about it." Jia Dongxu hurried into the inner room, changed into clean clothes, and walked towards Yi Zhonghai's house.

Li Aiguo and Chen Xueru returned home with their children.

When the residents in the compound heard the news, they all came to visit, carrying things in their hands. For a while, the courtyard was bustling with activity.

At this time, Yi Zhonghai was sitting at home chatting with a middle-aged man wearing a Zhongshan suit and black-framed glasses on his nose.

Jia Dongxu was serving tea and water beside him.

It's said to be a chat, but in fact it's a consultation.

Yi Zhonghai respectfully poured tea for the middle-aged man, holding a notebook, and said:
"Professor Chen, I'm a little confused about the roll gap calibration parameters. Recently, the machines in our fitter workshop have been having problems, and the products produced are substandard, resulting in a waste of state-owned assets."

Yi Zhonghai concealed one thing - the reason why he wanted to find out the roller gap calibration parameters was not to save materials, but to prepare for the fitter promotion examination in more than a month.

After failing to get promoted last time, Yi Zhonghai offended Li Huaide.

Yi Zhonghai realized that taking the shortcut was not going to work, so he started to think of other ways.

As long as I understand the specific principles of that old Russian machine in the workshop and improve the existing technology, I might get a chance for promotion.

However, after studying hard for a period of time, Yi Zhonghai found that his mathematical level was too poor to solve the problems encountered in improving the technology.

Yi Zhonghai was a very smart man. With the help of an old friend, he took great pains to get to know Professor Chen from the Department of Mathematics at Beijing University.

Afterwards, Yi Zhonghai deliberately contacted Professor Chen in the identity of a worker friend.

Professor Chen is a simple person. When he learned that Yi Zhonghai was contributing to the factory, he agreed to help without hesitation.

Today is the weekend, and Yi Zhonghai asked an old lady to buy meat and vegetables early in the morning.

He took the opportunity to invite Professor Chen, hoping to use his abilities to solve his own problems.

"Come, let me take a look." Professor Chen picked up the notebook, glanced at it, and smiled: "Comrade Yi Zhonghai, although I don't understand your machine, judging from the calculation, your technical improvement is a bit wrong."

"Ah? I can't do that."

"Look here. This is the error matrix compensation. But it is obvious that even domestic machines cannot have such a large error."

"hiss"

When Yi Zhonghai's mistake was pointed out, his face immediately turned ugly.

This was something he had spent more than a month researching.

"Professor Chen, is there no way to improve it? You are a mathematician, so you should have a way." Yi Zhonghai was somewhat unwilling to give up.

Jia Dongxu was very perceptive. He quickly took out a Da Zhonghua from the cigarette box, handed it to Professor Chen, and lit it.

Professor Chen took a puff of his cigarette and narrowed his eyes: "My ability is indeed limited. If Master Li were here, he might be able to find a way."

"Master Li, Professor Chen, the title of master seems a bit inappropriate." Yi Zhonghai didn't dare to contradict Professor Chen directly, so he gave a subtle reminder.

After realizing his concerns, Professor Chen smiled and said, "The masters in our mathematics community are different from those masters who engaged in feudal activities before liberation. It is a respectful title for great mathematicians."

Great mathematician! Yi Zhonghai nodded: "Just like the master chef among our workers?"

"No, no, no. There are many master mathematicians, but only the top few mathematicians can become a master." Professor Chen's eyes were full of longing when he mentioned these things.

Jia Dongxu became excited: "Professor Chen, how many math masters do we have now?"

Professor Chen raised his eyes and thought for a moment: "At present, there are only Master Hua, Master Su, Master Jiang, and this new Master Li in the country. Among them, Master Li is the youngest, only about 21 or 22 years old."

"He's only in his twenties, but he's so capable. It's incredible." Jia Dongxu stood up in surprise, his eyes full of disbelief.

How could this man be younger than him!
"It's really amazing. I had just graduated with a master's degree at his age, but he has already solved a world-class mathematical problem, become famous in the international mathematics community, and received praise from foreign mathematics masters." Professor Chen said with a sigh.

“Famous in the international mathematics community” even made Yi Zhonghai’s pupils shrink.

He thought that Professor Chen was already very capable as a well-known mathematics professor at Jingcheng University.

But compared to Master Li, who became famous all over the world in his twenties, his achievements are nothing.

"It would be great if I could meet Master Li."

****
At the door of Li's house at this time.

"Congratulations, Patriotism!"

"Sister-in-law, I, Da Kui, am here to congratulate you."

There was a loud noise outside.

Then there was the sound of a radio wailing.

The conversation in the house was interrupted.

Yi Zhonghai originally wanted to ask Professor Chen about the identity of Master Li, and then go and ask Master Li for advice.

Now he couldn't bear it anymore and strode out of the house.

"Old Yi, where are you going?" Professor Chen asked when he saw that his face looked strange.

"Master, take me with you." Jia Dongxu followed Yi Zhonghai out of the house.

The two came to the door of Li Aiguo's house.

Wang Da Kui brought the radio that Li Aiguo had made before and placed it in front of the door of Li's house.

There were bursts of singing coming from the radio and the residents were gathered together to watch the fun.

"What are you doing! Today is the weekend. Will you disturb everyone's rest by doing this? How can we produce if everyone can't rest well?" Yi Zhonghai put a big accusation on him as soon as he came up.

Li Aiguo was greeting guests in the house and was not aware of this.

Aunt Liu happened to be outside the door and quickly explained the situation to Yi Zhonghai.

Upon learning that the Li family had a new baby, Yi Zhonghai could only suppress his anger, "Sister-in-law, I'm not deliberately looking for trouble, but today's situation is indeed unusual."

Jia Dongxu came over from the side and raised his hand: "Not ordinary!"

Yi Zhonghai continued, "In order to solve the production problems of our steel mill, I specially invited a great professor from Jingcheng University. The professor's time is very precious, so please be quiet."

Jia Dongxu raised his hand: "Time is precious."

Yi Zhonghai's request was a bit excessive. The Li family had a big happy event, and relatives and friends came to congratulate them, and you asked them to be quiet. How could this be called a big deal?

At this time, Liu Haizhong and Yan Bugui also arrived. Liu Haizhong saw that something was wrong and pulled Yi Zhonghai's arm: "Old Yi, there is no need, it is really not necessary. We are all neighbors in the compound."

Yi Zhonghai was furious when he saw Liu Haizhong helping Li Aiguo again.

He also knew that the accusation that Li Aiguo was disturbing the public with noise was somewhat untenable. He rolled his eyes and pointed at the radio wire and said, "The Li family's radio is also a wire, right? How could they just connect it so casually?"

Upon hearing this, Wang Da Kui, who was protecting the radio, turned green in the face.

The faces of several residents also looked grim.

According to the regulations of the Electricity Bureau, any addition of electrical appliances to the home must be reported promptly and registered.

The power company can then charge electricity bills based on the number of appliances used.

"Old Yi, how much electricity can a radio like this use? There's no need, no need." Liu Haizhong tried to smooth things over.

Yi Zhonghai frowned: "Liu Haizhong, you are the second uncle in the compound. It is your responsibility to supervise the electricity usage of the residents in the compound. Now you are protecting Li Aiguo!"

"I" Liu Haizhong didn't expect Yi Zhonghai to not give him any face, and felt a little depressed.

Yi Zhonghai felt that he had caught Li Aiguo's handle, and he became more energized and more confident.

"Li Aiguo's behavior is, at best, petty greed, and at worst, stealing electricity and state property, which is a crime!"

(End of this chapter)