After a long flight, a blue-and-white plane landed at the Philadelphia airport in Pennsylvania.

Looking at the familiar scene outside the thick glass window, Xu Chuan sat quietly in his seat for a while, until the airline flight attendant smiled and handed over his backpack.

When he came to this country again, he felt a little depressed, but this is not what it used to be, and the tragedy of his previous life cannot happen again.

After taking a long breath of turbidity in his chest, Xu Chuan politely showed a smile, took the backpack and thanked him.

Flicking the backpack over his shoulder, Xu Chuan got up to leave, and dialed a phone number by the way after getting the suitcase.

"Hey, Senior Brother Lin."

"Well, Xu Chuan, you got off the plane, I'm waiting for you in the arrival hall, I have a fast sign in my hand, with your name written in Chinese, you can see it at a glance."

On the other end of the phone, a hearty voice came.

"Okay, I'll be right there."

Xu Chuan answered, and after a brief exchange, he walked towards the arrival hall with his luggage.

The senior brother Lin on the other end of the phone is a disciple of his mentor Chen Zhengping, Lin Feng, who is currently studying physics at Princeton.

Long before the Chinese New Year, Chen Zhengping passed the contact information of the two to each other, and greeted Lin Feng, confirming that he would come over to pick it up.

After all, Xu Chuan is going abroad for the first time, and it is not right, it should be said that it is the first time to go abroad alone, plus the age is only eighteen years old, so Chen Zhengping is still a little worried.

Xu Chuan didn't refuse the kindness of his mentor, anyway, he was very familiar with Lin Feng in his previous life.

As soon as he walked to the arrival hall, Xu Chuan saw the familiar Senior Brother Lin in the crowd at a glance.

The main thing is that it is too prominent, Senior Brother Lin is holding a huge piece of white cardboard in his hand, and there are two big 'Xu Chuan' on the cardboard, which is not good if you don't want to see it.

Dragging his luggage, Xu Chuan quickly walked over.

"I've kept you waiting, Senior Brother Lin."

Walking in front of Lin Feng with a smile, Xu Chuan said hello, and Lin Feng, who was still holding a sign, was stunned for a moment when he saw Xu Chuan, and he didn't react a little.

After looking at it twice, and after confirming that it was correct, Lin Feng was surprised: "I only know that the teacher brought a new disciple last year, but I didn't expect you to be so young, I think you shouldn't be twenty years old, right?" ”

Xu Chuan nodded with a smile and said, "Not yet." ”

"It's incredible, under the age of twenty, you can solve a world-class conjecture on your own, tsk."

Saying that, Lin Feng looked at Xu Chuan twice, as if he was looking at a peerless treasure: "Let's go, I'll take you back to Princeton, looking forward to your report this time, I will definitely listen to it." ”

"I'm sorry for the trouble, brother."

"What's the matter?"

Lin Feng waved his hand, took the black suitcase from Xu Chuan's hand, and dragged it towards the parking lot.

......

It's not that far from Philadelphia to Princeton, just over an hour's drive is enough.

Soon, the two were at Princeton University.

"Well, the environment and scenery here are not bad." After getting out of the car, Lin Feng asked Xu Chuan.

Xu Chuan nodded and said, "It's really good." ”

Princeton University was founded in 1746, when the country was still under colonial rule, and all kinds of architectural styles had a strong British style.

The old Gothic building is beautifully designed, and the library has the illusion of being at Hogwarts.

Add to that the fact that the university is sparsely populated and in a unique rural city, surrounded by greenery, grass, and clear rivers that surround the town, and the entire university is surrounded by Lake Carnegie.

But if you want to talk about familiarity, he is much more familiar than Lin Feng.

In his previous life, he had lived here for fifteen years, and he could clearly understand the layout of the school with his eyes closed.

"Let's go, I'll take you to check in." Lin Feng grinned and took Xu Chuan to the administrative building.

He handed the invitation letter for the academic report mailed by Princeton to the front desk staff, checked the information, and checked him in.

The front desk staff handed the room card to Xu Chuan and asked, "Your room is in 401, do you need me to take you there?" ”

Xu Chuan shook his head and said, "Thank you, no need, I'll just go by myself." ”

After dropping his luggage into the room, Xu Chuan went downstairs again, and Lin Feng was still waiting at the door.

"Let's go, I'll take you to Princeton for a good walk, and then sleep again in the evening, and your jet lag should be almost adjusted."

Lin Feng patted Xu Chuan on the shoulder and led him towards the Princeton campus.

Compared with universities in China, Princeton University is not fortified, there are no formal walls, and the school gate is just a sign, so there is no guard.

Except for superstitious students, everyone can enter and exit freely from this school gate; In other words, all of Princeton's small-town facilities were built around Princeton University.

Although it is located in the countryside, the security here is very good.

In other words, there are probably a lot of rich people here, so the law and order are very good.

Because of the unique academic environment, coupled with the quiet and peaceful life of the town, and the aristocratic atmosphere shrouded in a strong cultural atmosphere, the small town of Princeton has become a favored residence for the upper class of the United States

And according to Xu Chuan, according to the financial statistics of Princeton University, the alumni donations of previous graduates have reached an average of 2 million meters.

That is, every student who graduates will bring Princeton 2 million meters of gold in the future.

And how many students are going out of Princeton? I can't count it anymore.

In 2017 alone, Princeton received a total of $23.4 billion in donations.

As a result, Princeton University is also known as the richest university in the world.

"Are you going to continue your studies in mathematics in the future?" Walking around the campus, Lin Feng asked with a smile.

Xu Chuan nodded and said, "It should be." ”

"Have you considered Princeton?"

"Well, of course I thought about it, after all, it's a mecca of math and physics, and it almost perfectly meets my goals." Xu Chuan looked at the scenery of Princeton University and sighed slightly in his heart.

For the Chinese, Princeton, the three top schools in the United States, is actually recognized as the best to approach and apply, at least 98% of applicants have the opportunity to interview.

Moreover, Princeton attaches great importance to science students from China, especially majors in physics and mathematics, and Princeton likes Chinese students very much.

Because she prefers kind, responsible students who are down-to-earth, humble, and rigorous in their studies.

The Chinese are comparatively more in line with this goal than people from other countries.

In contrast, Harvard and Yale, which are of the same name, are different, and these two institutions have fewer Chinese students.

Harvard only admits two kinds of Chinese, one is students who are very unique in a certain field, or only the most "good" and "outstanding" students in one field.

The other is a star student with high intelligence that is not good, and the condition is a perfect SAT score or GPA 4.0.

Yale, on the other hand, prefers to recruit social youth with leadership and philanthropic students, so the Chinese basically do not meet the goal.

And the political nature of Yale is a bit exclusive, because Yale has trained a lot of presidents for the United States, and there are various political bonuses.

.......

After taking Xu Chuan around the campus and introducing various scenic spots, the two came to the place where the mathematical research exchange conference was held.

The meeting will start tomorrow, but it's already lively today.

In addition to those who were invited to come here like him, there were also many mathematics professors and students who came from far and wide at their own expense.

These people are scattered on campus, in classrooms, in libraries, and at parties, looking for their own opportunities and exchanges.

Here, if you casually meet an inconspicuous old man on the road, he may be a master in the world of mathematics.

If you're lucky enough to meet him and recognize him, stop him on the road and ask him questions.

Don't worry about rejection, unless the other party has something urgent, they will generally stop and communicate with you.

Here, everyone has the right to express their thoughts and opinions, and the academic soul has penetrated deep into this university.

But there are few places to entertain here, and for Princeton students, perhaps the best entertainment is to take a walk on the shores of Lake Carnegie, contemplate the lectures, and explore academic research.

On a regular basis, Princeton University hosts various exchange meetings and parties almost every week for professors and students to exchange ideas and think about academic issues.

International mathematical research conferences like this are a top priority, so in addition to a few nights of formal exchanges hosted by Princeton, there are various mathematical exchange points on campus.

Some are on the side of the road, some are in the library, some are in the classroom, in different locations, and the content of communication is different.

Just like the points of doing tasks in the game, these math exchange points are organized by the math professors or students who come to communicate.

If you're lucky, you might even run into Princeton's math elder Charles Louise Feynman, who was hired as a professor at the University of Chicago at the age of 22, the youngest mathematics professor in the history of the United States, and a Fields Medal-winning giant who likes to do this kind of thing.

He likes to build a small base by himself like those professors from outside, and then wait for someone to bump into him and communicate together.

In fact, this is almost the reserved easter egg of every international mathematical research exchange in Princeton.

The professors and students who came to participate roamed the campus, looking for the hidden NPC that would soon drop.

Xu Chuan and Lin Feng were no exception, and the two were looking for traces of the elder on campus.

In his previous life, he and Feverman were friends, and they may have known each other a little earlier in this life.

But before he could swipe this NPC, he bumped into another familiar person.

......

On campus, Xu Chuan, who was wandering randomly, saw a familiar figure, Academician Zhang Weiping of Sun Moon University, followed by a young man.

Stunned for a moment, he stepped forward and said hello: "Teacher Zhang." ”

Hearing some familiar voices, Zhang Weiping turned his head curiously, and when he saw Xu Chuan, his eyes lit up, and he enthusiastically stretched out his hand and patted him on the shoulder.

"Your kid is here too, I haven't seen you for a long time, but it's been okay lately."

On the side, Lin Feng glanced at Xu Chuan and Zhang Weiping with some confusion and curiosity, and waited for the introduction with a smile.

"Academician Zhang Weiping, a professor at Riyue University, is a super giant in the field of geometry in our country, and a top bull in the field of mathematics."

"Mr. Zhang, this student of my mentor Chen Zhengping, Lin Feng, is currently studying physics here at Princeton."

Xu Chuan introduced each other with a smile.

"It turned out to be a disciple of Academician Chen, hello, hello."

Zhang Weiping smiled and stretched out his right hand, seeing this, Lin Feng was stunned for a moment, and then quickly shook his hands enthusiastically.

"Academician Zhang, you are too polite, just call me Xiaolin, I am currently studying for a doctorate in Princeton, please feel free to ask me if there is anything I can help during the exchange meeting."

Hearing this name, Lin Feng reacted instantly.

Zhang Weiping, isn't this the author of the textbook "Plane Geometry"?

If he remembers correctly, this is a close disciple of Chen Lao, who has extremely high attainments in plane geometry and analytic geometry, and has won various top mathematics awards such as the Chern Mathematics Award and the Hua Luogeng Mathematics Award.

Super awesome!

I didn't expect the little junior brother to be so familiar with this kind of big cow.

He was going to take his junior brother to introduce a few Princeton professors to pretend to be β, but now it seems that it is better to forget it.

.....。