Hanging up the phone, as soon as Xu Chuan turned around, he was taken aback.

The three friends behind him stood behind him and eavesdropped.

"Brother Chuan, is it a call from my sister-in-law, tell me honestly!"

"I hear a female voice!"

"Bring it here, let my sister-in-law come over quickly, we also know each other."

The three of them were gossiping, Xu Chuan couldn't help but roll his eyes, ignored this group of friends who ate melons, and walked back to the table.

Skipping this topic, the four of them touched a few glasses in a row, and after pouring down two bottles of beer, the topic gradually opened.

One will talk about the arrangements after graduation, the other will talk about games, and sometimes transfer to what happens at home and abroad.

For example, a female college student at a school who stole headphones was not only not punished, but was protected from research.

For example, a certain star participated in the idol trainee and released a self-introduction video, which became popular because he practiced for two and a half years and played basketball in suspenders.

I haven't seen each other for nearly a year, which is still quite a long time for the college student community.

Unlike after entering society, it is not uncommon to not see each other for a few years, or even for life.

......

After eating a meal for two hours, the four of them dispersed, and agreed to get together again when the three of them graduated.

Xu Chuan returned to the hotel arranged by Nanda, he didn't forget that he also made an appointment with his senior sister for dinner in the evening, took a shower, got rid of the smell of alcohol, and took a nap to rest.

The alarm clock in the afternoon woke him up, stretched his waist and got up from the bed, Xu Chuan touched his mobile phone and looked at the time, it was almost four o'clock.

After opening the computer and processing the emails in the mailbox, and replying to some messages, he got up and came to Xiaoxianzhuang at the south gate again.

Just as he was about to send a message to his senior sister and ask her when she would be able to come, a familiar figure sitting by the window came into his eyes.

Walking over quickly, Xu Chuan shouted with a smile, "Senior sister." ”

"You're here."

The senior sister, who was reading with her head down, raised her head when she heard the voice, and when she saw Xu Chuan, her eyes showed a hint of joy.

"Sorry to keep you waiting." Xu Chuan said embarrassedly.

I thought he should have arrived first, but I didn't expect this senior sister to arrive earlier than him.

"It's okay, I've only been there for a while." The senior sister whispered, and by the way, she put the book in her hand together and put it on the table.

Xu Chuan glanced at the book that the senior sister put together and put on the table, and the "Introduction to Algorithms" on the cover made him smile with relief.

With the support of his original suggestion and the bonus of the tungsten diselenide scientific research project, the senior sister finally embarked on the road of further study, and also achieved very excellent results.

I have to say that his vision of people is quite accurate.

At the beginning, he felt that this senior sister had great potential for further study in academics, and now the facts have proved it.

It may be that the difficulties in life have been solved, and she no longer needs to work part-time day and night, and she has exploded with great potential in her studies, and she has just entered her junior year, completed her undergraduate studies and entered the master's study stage.

Now, more than a year has passed, and I occasionally chatted with Professor Zhou Hai and heard that she is almost finished her graduate school and is preparing to apply for a doctoral examination.

It takes two years to complete the bachelor's degree and more than a year to complete the master's degree, which can be said to be quite fast.

Xu Chuan sat down and asked, "Have you ordered?" Senpai"

"Not yet." Senior Sister shook her head.

Hearing this, Xu Chuan waved to the waiter in the store and shouted, "Waiter, order." ”

Soon, a waiter came over, and it happened to be the aunt who happened to be noon.

After seeing Xu Chuan, her eyes lit up, and she said: "Young man, it's too late for you to come, your little girlfriend has been waiting here for at least half an hour, even if you are a big scientist, you must remember to be punctual on your date." ”

Xu Chuan was stunned for a moment and glanced at his senior sister.

Didn't you say you had just arrived? What is the situation of more than half an hour, and it is not yet half past five, that is, she came at four o'clock?

was exposed by the waiter's aunt, and the senior sister was also stunned for a moment, and then a blush floated on her face, and she lowered her head embarrassedly.

Xu Chuan coughed, looked at the waiter's aunt, and said, "I'm sorry, I'll pay attention next time, let's order first." ”

He didn't bother to explain the misidentification that this waiter aunt had been mistaking.

Whatever.

After ordering, Xu Chuan looked at the senior sister and asked, "Which field is the senior sister going to study deeply?" ”

"Mathematical Algorithms and Artificial Intelligence." Liu Jiaxin replied in a low voice.

"It's good, these two fields will be hot fields in the future, as long as you have the ability, it is not difficult to earn tens of millions of dollars a year."

Xu Chuan replied with a smile, although the annual income of 10 million sounds exaggerated, but this is not that he is bragging, the top experts in the field of mathematical algorithms and artificial intelligence say that the annual income of 10 million is less.

For example, a certain sound that will gradually become popular from next year, its algorithm expert in the future of the United States has offered an annual salary of more than 100 million yuan to poach people.

This shows the potential of this industry.

In the future, the field of algorithms and artificial intelligence is the hottest development prospect, after all, the era of big data is inseparable from these two.

Hearing this, Liu Jiaxin's cheeks were dyed a little red, and she was a little embarrassed to bow her head slightly.

I think she thought that the annual salary of two or three hundred thousand yuan was already exaggerated.

"Are you still going to study at NTU for your Ph.D.?" Xu Chuan asked curiously.

Although the mathematics department of NTU is not very good, the computer major is still quite good.

Although the scale is not large, it is a high-precision and cutting-edge road.

It is one of the best in China in core fields such as software, AI, architecture and data mining, and the quality of scientific research output is extremely high.

Liu Jiaxin nodded, glanced at Xu Chuan, and continued: "But I applied to my tutor for an exchange of international students in Princeton. ”

Xu Chuan was stunned for a moment, and then said, "It seems that your academic performance is much better than I imagined." ”

He was not wrong, not only did the Department of Mathematics of Princeton University not accept a few doctoral students from China in a year, but the same was true for the Department of Computer Science, and the students who were admitted in China in a year were also accepted with one hand.

Although the Department of Computer Science of NTU is not ranked very high in China, it is the only three domestic universities with a first-class key discipline of computer science, a national key laboratory, a double-first-class world-class discipline, and a national top-notch base.

Although the number of places called exchange students in Princeton is small, it is not impossible.

However, it is quite difficult to apply for an exchange student quota, and if you can't be in the top five of this discipline, you basically can't get this place.

That's why he sighed that his senior sister's grades were much better than he imagined.

After a pause, he continued: "It's good to go to Princeton to study, although the computer science subject of Princeton is not as good as mathematics and physics, but it is also quite good. ”

"And your study direction, mathematics, algorithms, and artificial intelligence are all excellent subjects over there, and you can learn a lot."

Senior Sister nodded vigorously and said seriously: "I will work hard." ”

Xu Chuan smiled and said, "Come on." ”

......

After staying at NTU for five days, Xu Chuan left for home.

On the one hand, it is necessary to go through a ceremony to accept the title of honorary professor of NTU, and on the other hand, it is necessary to accept the award ceremony of NTU, the city and the province.

After all, people have sent you money, and it is necessary to go through a process in the past and let the media take a few photos to cooperate with the publicity.

On the other hand, in addition to giving a speech to the younger students of NTU, he also needs to hold a report meeting at NTU.

This is something he had promised a long time ago.

As for the content of the presentation, there is no doubt that it is Hodge's conjecture.

In fact, he received a lot of invitations for this type of lecture.

Whether at home or abroad, many universities and even some scientific research institutions have sent him an invitation letter to invite him to come over to give a report or give a speech.

The largest university even paid 300,000 meters of gold.

But most of the reports or speeches Xu Chuan declined, leaving only domestic invitations.

On the one hand, he doesn't have that much time to run around and give speeches or anything.

On the other hand, it is because he is a Chinese and a student of NTU.

Although the development of mathematics is gradual, a report meeting cannot immediately improve the development of the domestic mathematics community, but it can still play some role in the end.

As a top scholar in this field, if he has the heart to spread this knowledge, he can still play a lot of roles.

Although it may take years or decades for this effect to fully manifest itself.

But the subtle influence is there, and it won't fly away.

......

After dealing with the affairs on Jinling's side, Xu Chuan bought a ticket and took the high-speed train from Jinling back to Star City.

It's a little faster to fly, but it's not that much faster.

It is very troublesome to go down the various processes of entry, ticket inspection, and waiting for the plane.

In China, if you talk about the high-speed rail journey within five hours, from departure to departure, in fact, high-speed rail is not much slower than airplanes.

And more importantly, high-speed rail is more comfortable and gives people a sense of security than airplanes.

After all, it is running on the ground, and if something happens, there is still a glimmer of hope, but if there is an accident on the plane, it is really called that the earth is not working.

Dragging his suitcase, Xu Chuan went to Xingcheng No. 1 Middle School.

Before returning to his hometown, he had to go to No. 1 Middle School to pick up Xu Xiao's girl.

For this, Xu Xiao grinded him on the phone for a long time.

Although he didn't know why the girl insisted on asking him to pick it up, after grinding for a long time, he finally couldn't bear it and agreed.

It's okay to go and see Old Tang again.

For Lao Tang, Xu Chuan has always been very grateful.

After all, how many geniuses are there in this world? But there are a few that have really come out.

He and Lao Tang are the real-life version of Maxima and Bole.

In his previous life, if he hadn't been discovered and taught by this high school teacher, he would probably have been annihilated in the vast sea of people.

Standing at the school gate, Xu Chuan took out his mobile phone and called Lao Tang.

Hearing that he was at the door of No. 1 Middle School, Old Tang didn't come back to his senses for a while, and after being stunned for a while and repeating the confirmation, he quickly hung up the phone.

After a while, Old Tang appeared at the school gate and walked into the school with him.

"You kid, why don't you call in advance." Seeing Xu Chuan, Old Tang complained.

Xu Chuan smiled and said, "It's not a big deal. ”

Old Tang glanced at him and said, "Why isn't it a big deal, a Filipino Award winner came in person, and every school has to greet him, right?" ”

Xu Chuan smiled: "I haven't got it yet." ”

"Proves Hodge's conjecture, next year's Filipino Awards can run me with your surname!" Old Tang said with a disdainful face.

"Then should I say hello to the Philippine Award jury and ask them to postpone it for four years?" Xu Chuan joked with a smile.

Hearing this, Old Tang glanced at him again: "If you have the ability, you say it again?" ”

Xu Chuan hurriedly confessed and said, "I don't have the ability, I don't have the ability." ”

"But speaking of which, your silent proof of Hodge's conjecture really shocked a lot of people's jaws."

】

Old Tang sighed, and continued: "Although I know that your kid is talented in mathematics, this is too exaggerated. ”

Xu Chuan: "It's just an occasional inspiration. ”

"Alright, don't be modest." Old Tang rolled his eyes and led him towards the teaching building.

"By the way, teacher, when is the school winter break?" Xu Chuan asked as he followed Old Tang.

"The first and second years of high school have been released, and the third year of high school will be released the day after tomorrow, you came here to pick up your sister this time." Old Tang asked.

"And, of course, to visit you, teacher." Xu Chuan said with a smile.

"Heh, you're still a kid." Old Tang snorted, as if he remembered something, stared at Xu Chuan and continued: "Speaking of which, you have a good sister, exactly like you." ”

Xu Chuan smiled dryly, knowing what Old Tang was talking about.

......

"Dude!"

In class 1401, after seeing the figure at the teacher's door, Xu Xiao jumped over excitedly.

Xu Chuan smiled and rubbed this girl's head, and said, "Say, why do you want me to run in person, can't I take a taxi home by myself?" Your brother and I have a very tight schedule. ”

Xu Xiao wrinkled his nose, held his hand and shook it, and said, "You are my brother, what's wrong with coming over to pick up your dearest sister during the winter vacation?" ”

Xu Chuan glanced at her and said suspiciously: "That's it?" ”

Xu Xiao swore and said, "Otherwise? ”

As soon as she finished speaking, a girl in the same class next to her walked over, looked at Xu Chuan, and then at Xu Xiao, and said in a daze: "Really here?" ”

Xu Chuan asked suspiciously, "What's really coming?" ”

Hearing this, the girl in the same class reacted and said, "Xiaoxiao made a bet with me before, saying that she could let you pick it up....... Losing doesn't have a ....... Hmm, early ...... Rice"

Before the girl could finish speaking, Xu Xiao rushed up and covered her mouth.

However, Xu Chuan still heard something, and looked at Xu Xiao, who was fighting, with a black line on his face.

This sister can't be wanted.

.......

Successfully picked up Xu Xiao, and the two dragged their suitcases back to their hometown, no, it should be said that it was a new home.

Under his repeated persuasion, Xu's father and mother finally moved from the original two-story building to the villa that was repaired last year.

They didn't want to live here before.

In the eyes of Xu's father and Xu's mother, the villa was reserved for Xu Chuan's new home for marriage in the future, what did they do when they moved over, and the old house was not unlivable.

Parents are always like this, always wanting to leave the best things for their children.

But in the end, Xu Chuan still persuaded his parents, after all, the house was built for people to live in, so why should the house be repaired for people? Do you want to put it there and look at it?

And the difference between a house in the countryside, to be honest, between a person who lives in it and someone who doesn't live in it, is really big.

Uninhabited houses, even if they are newly built, will deteriorate very quickly.

It's like the houses left behind after the death of the five guarantee households, which will collapse after a year or two.

When he was alive, those old houses, even those mud houses made of loess embryos could withstand the wind and rain without hindrance.

In rural areas, this is called 'popularity', and only houses that are inhabited by people are popular, and if no one lives in them, God will help you take them away.

......