The unparalleled talent of the country started from Harbin Institute of Technology

Chapter 228, If Life Could Just Be Like Our First Meeting
May 28, 1983, 5:20 p.m.

On normal days, Wang Duoyu would definitely still be working in the office at this time and would definitely not run home at this time.

But today is a special case because Zhu Ling is here.

Or to be more precise, maybe Zhu Ling already knew that Liu Xiaoli was pregnant, and then she couldn't get over it for a moment and did something that would make Liu Xiaoli and Wang Duoyu regret it.

Because Zhu Ling used to be a doctor, she was able to successfully abort the child without her mother knowing, and no one found out afterwards.

Although Liu Xiaoli will definitely take every precaution and will never give Zhu Ling any chance to take advantage of her.

But you have to know that there is an old saying that goes that a woman will become stupid for three years after pregnancy. Although Liu Xiaoli may not necessarily become stupid, what if?
In short, Wang Duoyu couldn't guarantee whether this incident would happen or not, so he would go home to check it out as soon as possible.

"Professor, I was wrong!"

On the way back to the villa area from the experimental building, Su Zhenghuai kept apologizing because he didn't expect Wang Duoyu to be so angry and anxious.

Wang Duoyu didn't say anything, he just urged the security staff to drive faster.

Cars on campus are not allowed to drive too fast, and the security staff have no choice but to keep their eyes and ears open and drive as fast as possible.

Soon, the car stopped at the door of the villa. Before the car stopped, Wang Duoyu pushed the door open and rushed out.

Inside the villa, Liu Xiaoli and Zhu Ling were chatting and laughing, while the little kid beside them was playing and showing off something to them from time to time.

In addition, sisters Wang Meihe and Wang Meili were also there, while Liang Xiufen was busy in the kitchen.

"Brother, why are you back so soon? It's only five o'clock. Isn't it too early for you to come back?"

Seeing her ninth brother appear at the door, Wang Meihe and her sister were immediately surprised. Liu Xiaoli also stood up, her expression full of curiosity.

At this moment, Wang Duoyu was stunned where he was. He never expected that Zhu Ling and Liu Xiaoli could actually talk and laugh with each other?

Perhaps it was because the Wang Meihe sisters were also there, otherwise, Liu Xiaoli and Zhu Ling would never have smiled at each other.

"Well, I have less work today, so I'll go home early."

Wang Duoyu picked up the little guy who rushed over and greeted Zhu Ling.

After all, she is a guest, and she is also his ex-wife and the mother of his child. Wang Duoyu can't have a sullen face in front of the child, right?

Seeing Wang Duoyu coming back, Zhu Ling smiled warmly and shamelessly said that she wanted to stay for dinner.

Hearing the other party's words, Wang Duoyu just smiled and said a few polite words.

Then he went out to explain to Su Zhenghuai and the others, then came back, pulled Liu Xiaoli into the bedroom, closed the door, and asked in a low voice:
"Xiao Li, have you ever met Zhu Ling?"

The latter was still confused. After hearing this, she hadn't reacted yet and still smiled and said, "No."

"Ah That's good!"

Since nothing happened, Wang Duoyu felt relieved.

However, he still discussed it with Liu Xiaoli and said that they would go out to eat tonight instead of eating at home.

Now that Zhu Ling is here, no one knows if she knows anything about the situation. The best way is to avoid it as much as possible.

Doctors are experts in using medicine, and they are definitely experts in using poison.

So it’s really hard to say whether it’s poisonous or not.

Of course, everything is poisonous. Toxicity is just a property of the substance itself. Talking about toxicity without considering the dosage is just hooliganism.

Some substances can cause death with just a few tenths of a microgram, while some substances are not toxic even if consumed in large quantities.

But everything in the world is interdependent and no one can predict it for sure.

In short, Wang Duoyu is not a medical expert and doesn’t understand these things very well. Who knows what Zhu Ling is thinking?

If she gets fooled by accident, won’t Liu Xiaoli go crazy?

"Why do we have to go out to eat?" Liu Xiaoli asked in confusion, and Wang Duoyu almost held his forehead with his hands.

Forget it, Liu Xiaoli might have hated Zhu Ling at this time, but she probably didn't think of her as being so vicious, after all, Wang Junhong was at home.

If the unborn child in Liu Xiaoli's belly is her weakness, then Wang Junhong is Zhu Ling's weakness, or even her everything.

After all, if it weren't for Wang Junhong, she wouldn't appear in front of Wang Duoyu.

If Zhu Ling wants to deal with the baby in Liu Xiaoli's belly, then Liu Xiaoli will definitely not be nice to Wang Junhong, right?
But would Wang Duoyu be willing to see them fighting each other?

Of course I don't want to, and it's impossible for this to happen.

So the best way is actually to separate the two of them.

"Don't worry about it. Anyway, we're going out to eat tonight."

Wang Duoyu didn't explain much. He took Liu Xiaoli out of the bedroom, then went to the living room and announced the decision to everyone.

Liang Xiufen, who poked her head out of the kitchen, immediately advised:
"Uncle Jiu, I have already cooked the rice and cut the vegetables."

"Then cook it and bring it back for Jianda and the others to eat."

The matter was settled, and Wang Duoyu went out with the little ones without saying a word.

Isn’t it easy to just have a meal?

In the evening, Wang Duoyu and his friends were eating in a private room in the cafeteria. Li Yuanchao and Lu Qingsong were also called over because it would be more lively with more people.

After dinner, everyone went back home to see their own mother.

"Dad, why doesn't little mommy come home with us?"

At this moment, little Wang Junhong suddenly asked a question, causing everyone to look at Wang Duoyu.

You little brat, how come you are so good at asking questions?

The younger mother he mentioned is Zhu Ling, and the older mother is Liu Xiaoli.

"Because your mother still has a job when you are young, just like you need to study and work when you grow up, it's the same principle, do you understand?"

"I don't understand, but can we let the little mother live in our house?"

Wang Duoyu: “.”

The child is only two and a half years old. Why does Wang Duoyu feel that he can no longer be fooled?

It’s impossible that this little guy knows everything and is deliberately embarrassing his father, right?

After the little episode, Wang Duoyu and Liu Xiaoli returned home, coaxed the little kid to sleep, and then they lay down.

"If she comes tomorrow, let her and Xiufen take care of the child. When they bring the child back, don't worry about it."

Having said that, Wang Duoyu suddenly fell silent for a moment, then said:
"How about this, you go back to your parents' house for a few days, and come back after she leaves."

This was a helpless move. Although he was a little paranoid, Wang Duoyu still didn't want those things to happen.

Therefore, the best way is to avoid all of this first.

You can't wait until things have happened before you regret it, right?
Even if Liu Xiaoli was stupid at this time, she figured it out:

"So you came back in such a hurry today because you were afraid that I would be betrayed by her, huh? Are you overthinking it? She is still a college student after all, how could she be so desperate?"

Wang Duoyu heard this and said unhappily:
"Is moral quality necessarily linked to whether or not one has received higher education? Does that mean people who have received higher education are necessarily people with high moral standards?"

Before Liu Xiaoli could speak, Wang Duoyu interrupted forcefully:

"Alright, it's settled. Don't argue with me. You're pregnant with this child after much difficulty. If anything really happens... well, good things will come, bad things won't."

"Anyway, just listen to me. Go back to your parents' house tomorrow, and I'll pick you up in two days."

After settling this matter, Wang Duoyu seemed to feel a lot more relaxed.

But at this time, Liu Xiaoli suddenly said:
"Shouldn't you meet my parents?"

After these words were spoken, Wang Duoyu suddenly felt embarrassed.

Because he is usually quite busy, and so are her parents, both of them are very busy.

So it’s not easy to meet.

"Let's talk about it when we have time." Wang Duoyu still hadn't made up his mind.

Because once you meet each other's parents, the word marriage will inevitably come up, which is inevitable.

But if he really talked about these two words, it would go against his wishes, and this was not what he wanted to do.

So the best way to deal with it is actually to ignore it and delay it as long as possible.

Liu Xiaoli couldn't help but sigh when she heard this.

She actually guessed what Wang Duoyu was thinking, but she was not sure.

One thing is clear, that is, Wang Duoyu is the only one with her at the moment, no one else.

After all, he was not polite even to the beautiful Lu Ruoxi and Yuan Xueyi. He was not putting on a show for Liu Xiaoli, but he really was that kind of person.

You know, Wang Duoyu is usually very busy, and even his assistants are married men, not lesbians.

But for Liu Xiaoli, without that piece of paper, she would never feel at ease.

Even if she knew Wang Duoyu's secret fund very well, so what?
Why would Wang Duoyu need a small treasury now? He has a lot of money. Maybe even Wang Duoyu himself can't accurately calculate how much money he has?
Just because Want Want Group is making money every day, who knows how much money it will eventually make.

Ugh!
The next morning, Liu Xiaoli returned to her parents' home. When Zhu Ling came to the villa again, she did not see her.

She was a little surprised, but didn't care.

But in the evening, when she sent Wang Junhong back, she deliberately waited for Wang Duoyu to come back and then called the latter aside.

"Wang Duoyu, are you that worried about her? Haha, you underestimate me too much, don't you? Do I really need to do anything to her? Don't think I don't know anything, and don't think I'm so vicious."

Wang Duoyu was stunned for a moment, then said:
"You think too much, she just misses her parents."

He would never admit such a thing.

But Zhu Ling won't do that, which is naturally the best.

After all, if something happens, he will be caught in the middle and will suffer the most.

"Oh, a man who dares to do something but not to admit it!" Zhu Ling sneered, and then said: "You are becoming more and more difficult for me to understand. You used to like me so much, but now you hate me so much and are still so wary of me."

"If life could always be like our first encounter, why would the autumn wind bring sorrow to the painted fan?"

After a pause, Wang Duoyu continued, "It's getting late. You should go back and rest early."

Zhu Ling was suddenly silenced by what Wang Duoyu said.

On the way back, she was a little dazed and couldn't come back to her senses for a long time.

This is a poem written by Nalan Xingde in the Qing Dynasty. The last two lines are about how people's hearts change easily.

According to Wang Duoyu's response, he should be talking about Zhu Ling who had changed her mind, not him, Wang Duoyu.

It was obvious that their fate had ended after their divorce, and they should have been strangers from then on.

But Zhu Ling insisted on rekindling their old relationship, so it was very obvious who had changed his mind.

If Zhu Ling had not insisted on forcing Wang Duoyu to divorce, and if Wang Duoyu had not gone to Beijing later, with the help of her mother Fang Zhen, considering that Wang Junhong was still young, the two should have remarried, but she was determined not to remarry.

Who has changed his mind? Need I say more?
In the teaching building of the Department of Mathematics at Harbin Institute of Technology, Yuan Jigang ran to find Rong Guangxia and called him out of the latter's office.

"Laorong, what has your teacher, Professor Wang, been up to lately? It's already June, so aren't you going hunting this year?"

Upon hearing this, Rong Guangxia rolled his eyes at him and said unhappily:

"Is there anything else? If not, I'll go back."

In private, Yuan Jigang, Lou Jianguo, Yu Xinyao, Tian Maohua, Mo Ruogao and Zhu Hanting, the six of them, all teased him with the words "your teacher, Professor Wang".

Although in fact, Wang Duoyu is indeed Rong Guangxia's teacher, he also respects Wang Duoyu very much.

But after all, they were roommates in dormitory 303 and classmates, so it would be fine for others, but it was too much for Yuan Jigang and the others to joke like that.

In previous years, Wang Duoyu would go hunting once or twice. In the first half of last year, he traveled to Jiuzhaigou, Shanghai and other places. In the second half of the year, he returned to his hometown and stayed there for a full month.

But this year, it's almost June, and there is still no movement. It can't be that he has to attend the International Congress of Mathematicians in July and that's why he's not going anywhere, right?

"No, go ask your teacher. We hardly see him these days. Every time we see him on campus, he's surrounded by students. I can't do anything about it."

Upon hearing this, Yuan Ji hurriedly grabbed Rong Guangxia who wanted to leave and tried to persuade him.

This is true, because recently Wang Duoyu has been focusing on two major projects, so he rarely appears.

In addition, Liu Xiaoli was pregnant, and Zhu Ling often came to Harbin Institute of Technology to visit her son, making Wang Duoyu too busy to handle everything.

Upon hearing this, Rong Guangxia had no choice but to say that he would ask next time.

"Okay, then go ahead and ask. I know your teacher, Duoyu, is not very convenient for him to go hunting elsewhere right now, but he can go back to his hometown, or to Jianguo's hometown."

"I understand, just wait for my news."

A few days later, Rong Guangxia and Yang Nianzhen came to the office to find Wang Duoyu, but Su Zhenghuai told them that their teacher was in Laboratory Building No. 6.

Either wait or go over there and find their teacher.

In that case, let’s go find someone together.

Maxim walked with confidence because a few days ago, he finally got confirmed and passed the exam. As for the interview, it could be completely skipped.

He was not a student in name only before, but now he has a real identity.

Although this title is not that important and strength is the key, we can't say that he, the junior brother, has always been carrying such a title, right?

When they arrived at Laboratory Building No. 6, Rong Guangxia and the others had not seen Wang Duoyu yet and were told that they needed to wait.

At this time, Wang Duoyu was having a meeting with Lu Xuemin and others.

The progress of the Nebula supercomputing project is quite good. However, if the lithography machine department can make a breakthrough, the Nebula supercomputing project will be able to complete the task faster.

Upon learning that Rong Guangxia and the others were coming, Wang Duoyu gave a brief summary to Lu Xuemin and the others, and then got up and left.

When he came outside, Wang Duoyu met Rong Guangxia and the others.

"Why are you all here together? Do you all have problems?"

Seven students, all here, Wang Duoyu asked in surprise.

Yang Nianzhen and the others all nodded immediately. Seeing this, Wang Duoyu found them an office and started teaching them.

In fact, except for Maxim, the other six people including Yorkz and Bocherz can graduate successfully, but they all seem reluctant to graduate.

You know, they became Wang Duoyu's students in May 1981, and it has been two years now.

Nowadays, it has always been an era of elite education. What's more, Wang Duoyu often gives one-on-one lessons to his seven students.

Not to mention two years, even one year is enough for graduation.

Maxim also asked Yorkz about this question.

The latter's answer was this:

"Why do I have to graduate? If I graduate, even though I'll still be the professor's student, I can ask him questions and he'll definitely not refuse."

"But if I really graduate, then he will definitely continue to accept new students, right? Wouldn't he then have less time to devote to me?"

"The teacher is even busier now. You know about the Nebula supercomputing project. You said the teacher himself doesn't have enough time, so how much time will he have left for us to guide us?"

"Take Bochers, for example. He's been trying to prove the Demonic Group Moonlight Conjecture, but it's been two years, and the progress hasn't been very smooth. He's only written five related papers."

"You should know how difficult the Geometric Langlands Conjecture is, right? It's definitely more difficult than the Demonic Group Moonlight Conjecture, but what about the teacher? The second key paper has been submitted to the professors at the Ice City Institute for Advanced Study for review for a month, and they still haven't finished it. You can imagine how profound the teacher's paper is."

Why does mathematics worship genius so much?

That's because the papers written by those top geniuses are truly difficult to understand, yet they are the truth, the language of God. What others consider difficult is, but to top geniuses, it's something they can solve with their eyes closed, not really difficult at all.

At that time, Maxim's mouth twitched after hearing what Yorkz said.

The latter said that Bocherz had only written five papers. Wow, the other party really figured out the Versailles game.

After more than an hour, Wang Duoyu finally answered all their questions.

At this time, Rong Guangxia suddenly asked:
"Teacher, Lao Yuan asked me to ask you, will you go hunting again this year?"

Wang Duoyu was stunned for a moment, then shook his head and said:
"No, I probably won't be going out this year. I might go back to my hometown in a few days, and then go abroad in July. That's probably the arrangement."

Yorkzi suddenly said, "Teacher, can I visit your hometown?"

Yang Nianzhen, Li Jun, Maxim and others also agreed, hoping to visit his hometown.

"Of course I welcome you, but my hometown is in the countryside, and you may not be able to get used to it."

After hearing Wang Duoyu's words, everyone quickly said that there was no problem.

The current Dahonggou Village has undergone great changes.

Throughout last year, all of Lao Wang's relatives made money, so they all built new houses in their hometown.

Zheng Baoyin and Wang Jianchao built a large villa, but it was not one of those small two-story houses in the south. They were all one-story houses, but spacious enough.

The reason why we don’t build two-story houses is that the second floor is uninhabitable in winter.

As for laying floor heating, it is still not very feasible in this era.

Just like Wang Duoyu’s wooden house, there is an attic, but in winter, the attic is almost a storage room and rarely occupied because it is too cold.

Maybe the attic has a good view, but even if there is a fireplace in the attic, it is not warm enough.

Every household has a new house, and quite a number of them have come to Ice City, so if Yorkz and the others go to Dahonggou Village, they will definitely be able to stay there, and they don’t have to sleep in tents or squeeze together.

Seeing that they all wanted to go to Dahonggou Village so much, Wang Duoyu smiled and nodded without refusing.

That night, Rong Guangxia found Yuan Jigang and others and briefly explained the situation.

"Really? Oh, what an unfortunate coincidence! Why don't you wait until after summer vacation to go back?"

Yuan Jigang and the others said helplessly.

Because it is almost June now, Wang Duoyu should go back to his hometown in mid-June, but this time happens to be the final exam season of Harbin Institute of Technology, and as teachers, they cannot leave.

Otherwise, I could go back to Dahonggou Village with Wang Duoyu and go hunting together.

"Haha, we're going to Warsaw in mid-July, and you won't be able to see anyone then either." Rong Guangxia said with a smile.

That's really unfortunate, there's nothing we can do about it.

In the blink of an eye, it is June 1st, which is Children's Day.

Wang Duoyu took the little guy to the Ice City Zoo for a day. Zhu Ling accompanied them, as did Liu Xiaoli, Liang Xiufen and others.

The happiest person on this day was Wang Junhong. He was surrounded by so many adults and saw many animals.

Although these animals did not look very good and were far inferior to the prey he saw his father bring back from hunting in his hometown last year, they were living animals after all.

Seeing how much the little kid liked these animals, Wang Duoyu couldn't help but want to build a zoo himself.

Wildlife protection laws emerged in the following years.

Because of economic development, especially in places like Guangzhou, many people have money in their pockets and want to eat better.

As we all know, Guangdong people don’t care much about clothes, but they care a lot about what they eat.

Why do we work so hard in life? It's just to make our lives better. And in the eyes of Cantonese people, eating well is the true meaning of living a good life.

The saying that Guangzhou is the best place to eat is no joke.

Therefore, in the original time and space history, throughout the 1980s and 1990s, the place with the highest consumption of wild animals was Guangdong.

The reason why so many wild animals are eaten to extinction is actually because of this.

The ecosystem, which had been recuperating for nearly twenty years in the 1960s and 1970s, suffered a devastating blow after entering the 1980s.

Grothendieck's transformation from a top mathematician to a radical environmentalist was related to his own experiences.

But Wang Duoyu would never turn into such a radical, otherwise he would not have killed the little leopard as well.

In his previous life, he had never hunted any wild animals, but he was often told to protect wild animals.

Depend on!
Now that he was reborn, couldn't he enjoy himself in the era of free hunting?

Even if he didn't hunt those little leopards, the villagers near Qingshan Township would not let them go.

However, now that he has a child, and the little guy Wang Junhong loves animals so much, he would like to leave some for the little guy.

Otherwise, when the little guy grows up, he may not be able to see many rare wild animals.

"Well, I do need to think about it, but I'll discuss the specifics with Lao Liu and the others when I get back."

Wang Duoyu thought so.

The power of an individual is small, but the collective power and wisdom are absolutely extraordinary.

What's more, protecting the environment and the ecosystem is everyone's responsibility and requires collective maintenance.

After returning to Harbin Institute of Technology, Zhu Ling said that she was going back to Beijing and would come to see her son after some time.

In this regard, everyone just maintained superficial courtesy. In fact, no one wanted her to come to Harbin Institute of Technology so frequently.

After Zhu Ling left, Liu Xiaoli also returned to Harbin Institute of Technology.

"You still have to pay more attention to your diet and be more careful in your daily life," Wang Duoyu warned, but Liu Xiaoli looked helpless:
"Before I was pregnant, you told me to be calm. Now that I'm pregnant, you're even more worried than me, telling me to pay attention to this and that. How can I be that precious?"

Wang Duoyu said:

"I feel bad for you, please don't be ungrateful. This child in your belly was conceived with great difficulty. I don't believe you don't cherish it."

"Okay, I'm just reminding you. Your feet are on you. I can't control you. I'm going to work."

"Yeah, let's go."

Liu Xiaoli nodded gently and said with a smile.

Some people say that happy and complete families are rare, but in the 1980s, many families are actually quite happy.

Of course, in this era everyone is working hard and still worrying about solving the problem of food and clothing.

So Wang Duoyu is also quite worried. If he proposes to protect the environment and the ecosystem, will he be labeled as "bored and bored"?
hypocritical!

There may be many people cursing Wang Duoyu behind his back as Emperor Hui of Jin: Why don’t you eat meat porridge?
After arriving at the mathematics department building, Wang Duoyu sat in the office until ten o'clock in the morning.

He was busy deriving the fourth paper on the Langlands conjecture in computational geometry.

He has already derived the third paper, but it is still on the bookshelf. After all, John Milnor and others have not finished reviewing the second paper, let alone the third one.

In this fourth paper, Wang Duoyu needs to prove a duality theorem.

This theorem states that the left adjoint and right adjoint of LG-cusp (which can be viewed as the behavior of LG on a specific, smaller category) are isomorphic.

In other words, this is actually an important step in proving that LG is an equivalence functor.

Let’s put it this way, if this can be proved, then it can basically be said that the geometric Langlands conjecture has been proved by Wang Duoyu.

The only thing left is to use this conclusion to generalize to the general case.

Therefore, the key work is to prove this duality theorem, and the subsequent proof paper that extends it to general cases is less important.

Especially for Wang Duoyu, proving the duality theorem is a little difficult, but it is very simple to generalize it to the general case.

Of course, for other mathematicians, proving the duality theorem is definitely not that easy. It may take decades or even hundreds of years to prove it.

The Langlands Program, as the grand unified theory of mathematics, has only been around for a dozen or twenty years since it was proposed.

But Wang Duoyu just wanted to deduce it as deeply as possible, so as to establish his own position and create more golden bodies.

Only if his golden body is strong enough can he attract more people to come to Harbin Institute of Technology and the Ice City.

Only in this way can the Ice City Institute for Advanced Study become a new world mathematics center.

At ten ten, Wang Duoyu paused his work, stood up and moved around to relax his brain.

Sometimes, he still envied Lu Jiaxi's tireless spirit.

After a while, Wang Duoyu called Su Zhenghuai in the next office and asked him to inform him that this month's monthly mathematics sharing would be held on June 7th.

"Okay, Professor, I understand. I'll let you know right away."

Upon hearing this, Su Zhenghuai nodded and said.

After hanging up the phone, Wang Duoyu was about to continue working when the phone rang again.

His phone hadn't rung all morning, so why did it ring at this time?
That’s because Wang Duoyu unplugged the phone line and he didn’t want to be disturbed.

If it is an emergency, Su Zhenghuai will definitely be notified immediately.

As for Liu Xiaoli and Wang Junhong, they are the two people Wang Duoyu cares about the most, no doubt about it. If anything happens to them, they are so close, and they also know Su Zhenghuai's phone number.

Most of the time, Su Zhenghuai stays in his own office and rarely leaves.

After all, Wang Duoyu himself is a otaku, either staying in the office or in the laboratory.

After picking up the phone, Wang Duoyu realized that it was Li Kangmin calling.

"Professor Wang, I have good news to share with you. After our testing, we have finally successfully developed the immersion lithography machine you were looking for."

Wang Duoyu was stunned when he heard this.

A few days ago, he was talking about the lithography machine in the Nebula supercomputing project in Laboratory Building No. 6, but he didn't expect to receive good news today.

"Okay, okay, I'll be there right away!" Wang Duoyu was overjoyed and said three "OK" words in a row.

After hanging up the phone, he went straight to the lithography machine project team.

Su Zhenghuai happened to be in the corridor. Seeing Wang Duoyu in such a hurry, he thought something big had happened and became anxious.

Upon learning that the latter was going to the lithography machine project team, Su Zhenghuai said, "Okay, Professor, I'll go there later."

In the lithography machine laboratory, Wang Duoyu met Li Kangmin, Xue Yuheng, Yao Wenrong and others, and was immediately stunned.

Because they all have panda faces, I really don’t know how many days they haven’t slept.

No wonder they called him at around ten in the morning. It seemed like they were working all night.

There was still a rather unpleasant smell in the laboratory. Wang Duoyu quickly asked them to open the windows for ventilation and said:
"Lao Li, how many days have you guys not rested? How about this, you go back and rest first, and I'll come back tomorrow."

"No, no, no, we've had a good rest. Please help take a look. If there's nothing wrong, we'll rest for two days."

Li Kangmin grabbed Wang Duoyu and insisted that the latter stay.

Since he couldn't defeat the other party, Wang Duoyu had no choice but to agree.

Because he also knew that Li Kangmin and the others would definitely not be able to sleep at this time, unless he personally tested the immersion lithography machine they developed. Otherwise, it would be absolutely impossible.

So, Wang Duoyu followed the procedure, put on protective clothing with them, and then entered the dust-free workshop.

Yes, the lithography machine cannot be tested in an ordinary laboratory, but only in a dust-free workshop.

Any possible dust may lead to an accident.

So details determine success or failure, and this is not just talk.

As he entered the clean room, Wang Duoyu finally saw the so-called immersion lithography machine.

The entire workshop seems messy, but it is actually very orderly.

It’s like, many people see the math papers written by Wang Duoyu, which are all over the place and have no order at all, but in Wang Duoyu’s opinion, that is the best order.

"Professor Wang, you see, we're using the latest optical system for lithography. The increased numerical aperture of the system has improved the imaging resolution of the stepper-scan lithography machine."

"Our immersion stepper and scanner lithography machine can now meet the process requirements of imaging resolution below 85 nanometers."

After hearing Li Kangmin's report, Wang Duoyu's expression was full of smiles.

He could understand the excitement and joy in the other party's tone, because he had instructed the other party on the technology of immersion lithography machines a year and a half ago, and now, Li Kangmin and his technical team had realized all the boasts he had made.

The immersion step-and-scan lithography machine developed by Li Kangmin and his team has enabled China to achieve nano-level lithography technology, which is completely at the international leading level.

You should know that the current global lithography machine market is only at the sub-micron level, that is, the technical level of 195 nanometers.

The submicron range is between 100 nanometers and 1000 nanometers, and 1000 nanometers is 1 micron.

Nanoscale is less than 100 nanometers.

How should I put it, Li Kangmin and the others are really awesome.

Although it is only at the 85-nanometer level, there is still a lot of room for improvement compared to 45 nanometers, 20 nanometers, 10 nanometers, and even single-digit nanometers.

But that is also the international leading level.

One word: awesome!
"Okay, okay, that's great, Lao Li, thank you for your hard work!"

After they completed the test thoroughly, Wang Duoyu said happily.

"With this kind of technology, what's your chip manufacturing yield rate? Is it over 70 percent?"

As soon as these words were spoken, the smiles on Li Kangmin and the others' faces disappeared immediately, and they even looked ashamed and uneasy, because the yield rate was less than 20%.

The technology is very advanced, but because it is not mature enough, the yield rate is very low.

When a lithography machine manufactures chips, it does not manufacture them one by one, but on a wafer.

The entire process involves first selecting single-crystal silicon wafers, which then undergo chemical cleaning and flatness testing and can only be used after passing the test.

Next, photoresist is spin-coated on the wafer surface, and the surface of the wafer is evenly coated through rotation and curing. The design pattern is then loaded into the exposure machine of the lithography machine, and the pattern is projected onto the wafer through repeated exposure of the lithography machine.

The subsequent steps are development, etching, oxidation, etc., and finally semiconductor assembly.

The so-called semiconductor assembly is actually dividing the wafer into multiple chips, and then assembling and packaging them after passing the test.

At this time, not every chip on the wafer is the same product.

According to Li Kangmin and others, a 20% yield rate means that a wafer manufactured using an immersion stepper-scan lithography machine contains only about 20% nano-level chips.

Depending on the size of the wafer and the area of ​​the chip, a wafer can produce approximately two hundred to five hundred chips.

Assuming that a wafer can produce 200 chips, then a 20% yield rate means 40 chips.

There are another 160 chips, some of which should be sub-micron chips, and some are completely unusable waste chips.

After listening to this, Wang Duoyu was silent for a while and said:

"It's okay, 20% is 20%, we are also the world's leading level, you are the best."

"Well, you guys take a good rest first. After you've rested, we'll readjust our technology and improve the yield rate."

Li Kangmin, Yao Wenrong and others were greatly encouraged. They were already very happy as long as Professor Wang did not blame them. They did not expect that he would encourage everyone.

"I see you're all very tired, so you should go back and rest early. Your health is the capital of the revolution."

After Wang Duoyu's repeated urging, Li Kangmin and the others finally nodded and left the laboratory building.

Liu Deben, Lu Gongliang, Han Jue and others finally arrived. After all, this is an internationally leading lithography machine, and of course they want to come and see it.

They suffered losses on lithography machines in the past few years, and now they can finally get revenge, right?
Four hundred and fifty thousand US dollars for a lithography machine?

Haha, I want to raise the price now, to one million US dollars per unit. Who is in favor? Who is against?
(End of this chapter)