Hua Luogeng Class is a class founded by the University of Science and Technology of China under the Chinese Academy of Sciences to train young mathematicians. The students enrolled in it can even be compared with the students in the junior class, and they are all dragons and phoenixes, the pillars of the future Chinese mathematics community.

Part of the reason why Junxin agreed to teach Professor Wang in this class was because he had been independent from the orphanage since the beginning of the university, and he had nowhere to go during the holidays, and on the other hand, he wanted to see this group of students who were like the pride of the sky, and pass on his own mathematical thinking and influence to them.

did not let Gu Mengxue send herself, after all, it has not yet gone through the stage of striking hard, and the security in Beijing is not very good. Junxin was worried about Gu Mengxue's safety, so he didn't let him want to send it, but just packed his luggage with her. The one who came to deliver Jun's letter was Wu Zhe and his friend Wei Donglai, who were in the same dormitory. Among them, Wei Donglai asked for advice on a series of problems that had arisen in recent research, and was pulled over by Jun Xin and Wu Zhe to serve as coolies by the way.

The train went all the way south, Junxin waved goodbye to the two people standing on the platform, and then walked away all the way, and soon the two disappeared from sight. Junxin withdrew his gaze and carefully looked at the people around him.

Now China is not as developed as in later generations, so naturally there is no high-speed rail train, all trains are just green cars, fortunately, there is no Spring Festival in later generations, and there is still a long time before the Chinese New Year, so there are not many people on the train, so it does not seem crowded.

From Beijing to Hefei, Anhui Province, it takes at least 12 hours to take a green car. At this time, it is still very important to take care of the things around you, so who is sitting next to you is also more important.

There were five people in the seat Junxin was in, three opposite, and one next to him. The three sitting opposite should be a family of three, look at the dress, the man should be a teacher or intellectual, and later after the exchange only to know that it turned out to be an old intellectual, in order to complete the previous college dream, after returning to the city, he was ready to complete his college dream with the support of his wife and daughter. After the college entrance examination, probably because of the solid foundation, I was admitted to Beijing Normal University at one time.

After the resumption of the college entrance examination, educated youths have become a special group of them, many of whom have responded to the call of the central government, put down their books, and gone to the countryside to work as farmers. He has dedicated his precious youth to the country, so he generally has a high status. If educated youths are admitted to universities, universities must solve all aspects of clothing, food, housing and transportation for them.

Junxin has never met educated youths before, firstly, he basically stays in the house to do research and rarely goes to class, and the threshold of Mizuki University is high, and there are relatively few educated youths who can be admitted to university.

Sitting next to Junxin was a middle-aged and elderly man with washed clothes that had turned white, about forty or fifty years old, but probably because of a long-term lack of nutrition, he looked thin. During Junxin's conversation with him, he learned that he was a Chinese teacher at a middle school in Beijing, and that he was visiting a friend in Anhui Province.

Junxin only had a cursory conversation with them, and then most of the time he either became an audience member or teased the young girl.

Due to the long journey, Junxin carried a few books with him. These are Professor Hu's treasures. It was after reading Grotendieck's letter that day that Junxin asked Professor Hu the next day to borrow the EGA edited by Grotendieck, that is, "Fundamentals of Geometric Algebra". Professor Hu was reluctant to lend the English version of this set of books to Junxin. However, Junxin would prefer to get the French version of the book, because it contains some questions from Professor Hu when he asked researchers at IHES, and there are even some calculus formulas written by Grotendieck. However, Junxin didn't borrow it, because Junxin didn't know French at all, and it was useless to ask for it.

But it's okay to have an English version. So when the educated youth and the old teacher were talking about sexuality, Junxin moved his body, chose a more comfortable sitting position, and took out the book "Fundamentals of Algebraic Geometry" and read it.

"Which school are you, young man?" I don't know when, Jun Xin, who was reading a book, was woken up by a sound of inquiry, Jun Xin, who was in a daze, glanced around, and looked at the Chinese teacher next to him, no doubt, it was he who woke up Jun Xin, who was fascinated.

"Me?" Junxin didn't come back to his senses yet, and answered in a daze, "I'm a student in the Department of Mathematics at Mizuki University. ”

"Nice boy!" The teacher praised and said, "Is this coming back to Anhui Province to visit relatives or go home?" ”

"It's to work!" Junxin didn't say much.

"The young man doesn't look very old, why did he graduate?" The teacher asked, surprised.

Junxin closed the book and said, "It is an opportunity for exchange and study during the holiday arranged by the school, and I went to the University of Science and Technology of China in Anhui Province to participate in the study seminar!" ”

"HKUST? That's the pride of our Anhui Province! The educated youth, who heard the conversation between the two people on the side, spoke at this time.

"Oh? What an honor! Junxin said, "Are you from Hefei?" When I get to Hefei, I am not familiar with the place, if your brother is also in Hefei, if you are familiar with the road, you have to ask for directions, after all, I am still the first time to come to Hefei, and I don't know that the University of Science and Technology of China is in that direction! ”

"Ho, young man, you can be regarded as asking the right person, I have been in Hefei for 20 years, I am familiar with the streets and alleys, the University of Science and Technology of China will arrive at the station in a while, I will point you directly to go!" The teacher said cheerfully.

The three of them chatted for a while, and then went to rest. Only Junxin once again took out his book "Fundamentals of Algebraic Geometry" and began to read it again.

Long before Junxin went south, he had sent a letter to Grotendieck, in which he explained his views and raised some of the problems he had encountered in his current research to ask Grotendieck for advice. He also expounded to a limited extent the ideas he wanted to carry out research in some directions towards the development of mathematics. At the end of the letter, he explained to Grotendick his understanding of mathematics as a necessary tool for human survival.

Compared with the reply to the Pope Grotendick, Junxin changed the draft several times, and the reply to Professor Huntingshen was very simple. In the letter, he thanked Professor Chen for his great love for him, but he has not yet considered studying abroad, but he can consider going to the United States as an exchange student for one or two years in his sophomore or junior year. In the letter, he explained that quasicrystal, a substance, was discovered under the strict derivation of mathematics. I hope to be recommended by Professor Chen.

The train rumbled on the tracks, and Junxin was immersed in the vast world of mathematics in the rumbling sound all the way.