It's not too early to send the letter, and it's almost two o'clock when I look at my watch.

At three o'clock in the afternoon, I had to go to Peking University to finalize various matters of work with Cai Yuanpei, which was a big event.

For the sake of safety, Cheng Nuo decided not to eat lunch, and the inn was not ready to go back, so as to run directly to the destination, so as not to be late due to twists and turns along the way.

As for Li Laosan, who said that he was going to pick him up, he could only be sorry for the time being, and he would explain it later, I believe that with Li Laosan's personality, he should understand.

The current Peking University follows the site of the Beijing Normal University Hall, so the distance from Dongjiaomin Lane is not very far, and it also belongs to Dongcheng District in later generations.

After more than ten minutes, he came to Peking University, and after explaining his intention to the doorman, he was soon introduced to Cai Yuanpei's office.

It's just that I didn't expect to see from the outside of the door, there are still two guests in the house.

I looked at my watch, and it was exactly half past two in the afternoon.

As a matter of common sense, it is best to arrive at your destination in 15 minutes before you have a scheduled time to talk to someone.

Cheng Nuo is now arriving half an hour early, which is a bit premature and may catch people off guard.

"Oh, it's too early, Mr. Cai's guests haven't been sent away yet, let's wait outside first, just take this opportunity to transfer to Peking University and familiarize yourself with the environment in advance."

As soon as he wanted to turn around and go elsewhere, he was seen by Cai Yuanpei inside, and hurriedly came out to say hello: "Zhiyuan, why are you ready to leave just now, this is not my Cai someone's hospitality." ”

Cheng Nuo hurriedly waved his hand and explained: "Mr. Cai, you are joking, I am not here early, seeing that there are still guests here, thinking about not delaying your affairs, I am ready to visit Peking University, and I am just bumped into by you." ”

"Ahaha, Zhiyuan, there will be a chance to visit in the future." Cai Yuanpei smiled: "I'm not a guest over there, but a teacher in the school, your future colleague, who didn't come early but just right." ”

Said Cao Cao, Cao Cao arrived.

The people in the house also walked out, standing on both sides of Cai Yuanpei, one left and one right.

Seeing the people in the room walking out, Cai Yuan Pei Le hehe, he introduced to the older man next to him: "Zhiyuan, let me introduce to you, this is the senior of the mathematics department of Peking University, Professor Feng Zuxun, who has studied at Kyoto No. 1 High School and Kyoto Imperial University in Japan, and is the first international student in our country to study mathematics. ”

The senior, who is the head of the department in later generations, manages the affairs of the discipline to which he belongs.

As a modern mathematics educator in our country, he founded the Department of Mathematics of Peking University, and in the future, he also served as the director of the Department of Mathematics of Peking Normal University, Peking Women's Normal University and Northeastern University, cultivating many mathematical talents.

One of the most famous is his nephew Fan Ji, who is quite famous for his "Fan Qi inequality", which popularized the traditional fixed point theorem to set-valued functions, which is an important foundation in game theory and other fields.

Then he pulled the younger man and said, "This is Qin Fen, a full professor of mathematics, who still has some fate with you, and he also studied mathematics at Harvard University, so he should be regarded as your senior brother." ”

Finally, pulling Cheng Nuo's shoulder, Cai Yuanpei said: "This is Cheng Nuo I just told you, Cheng Zhiyuan, I was arrested by me as a strong man just after coming back from abroad, and he is also a skill, and I can't say that I don't support your math door in the future." ”

Slightly different from Feng Zuxun above, Qin Fen has not only studied mathematics education, but also served as the director of the Accounting Bureau, the executive secretary of the Ministry of Finance, and the political secretary of the Ministry of Economy, and has also studied economics.

The two laughed, and Feng Zuxun said: "Gong Cai, at this time and that time, we are open to talents like Zhiyuan, but the more government funds, the better." ”

"Yes, the more the merrier, the more the merrier, haha." Qin Fen also chimed in.

After seeing that they were all introduced, Cheng Nuo took the initiative to shake hands.

One is the future direct boss, the other is the pillar of the department and the senior of his alma mater, Cheng Nuo believes that people can be arrogant but not arrogant, and his posture is neither humble nor arrogant.

Feeling the power in his hand, Feng Zuxun said with satisfaction: "Cai Gong didn't praise you less before you came, saying that you are a pillar of talent, and now it is true to see a real person!" ”

"Wherever and where, I have to take care of my seniors in the future." Cheng Nuo said modestly.

On the other side, after shaking hands, Qin Fen quipped: "Actually, Cai Gong didn't finish the introduction just now, I studied astronomy and mathematics, which is a side branch, and I can't compare to your orthodox background." ”

"Senior brother, you are killing me, don't dare to say that, I have to learn more from you in the future." Cheng Nuo was embarrassed for a while.

Cai Yuanpei saw that several people had a good impression of each other when they met, and he was much more relieved.

The old and new factions on the liberal arts side are enough to give people a headache, but fortunately there is no chaos on the science side, otherwise this big shopkeeper would be really uncomfortable.

Seeing that they had almost introduced each other, he pulled them back to the house.

"Come on, come on, it's cold outside, let's go into the house and talk slowly."

The day of Layue is really not suitable for staying outside, especially in Beiping City at this time, it is estimated that there must be several degrees below zero, and you have to stomp your feet to prevent freezing numbness after standing for a while.

After a few people entered the house, Cai Yuanpei made a pot of hot tea and poured it for Cheng Nuo first.

"Come, Zhiyuan, have a cup of tea to warm up."

"Thank you, sir."

While Cheng Nuo got up to thank him, Cai Yuanpei asked the other two: "In addition to the resume materials I gave you earlier, do you have anything else to ask Zhiyuan?" ”

The two glanced at each other, and Feng Zuxun said: "Judging from the resume materials alone, Zhiyuan is indeed the talent we need in mathematics. ”

Then he looked at Cheng Nuo, who was drinking tea, and said: "It's just that there are many subjects under the major category of mathematics, and we don't know which one Zhiyuan is good at, so we can open subjects in the future." ”

"Yes, what Uncle Han means is also what the two of us mean, according to the needs of Zhiyuan, we can also formulate a science course report in advance to avoid affecting the start of the new semester."

When Cheng Nuo heard this, he immediately put down the tea under his hand and sat down.

The first article he submitted was algebraic number theory, which belongs to an important branch of number theory and one of the most important disciplines of modern mathematics, with great development prospects.

So after a short thought, Cheng Nuo replied: "I personally like algebraic number theory, and I study the overall algebraic structure and arithmetic characteristics. ”

"Algebraic Number Theory?!"

Feng Zuxun and Qin Fen spoke in unison, their tones full of shock.

As a layman, Cai Yuanpei didn't know what was going on, and asked: "Two professors, is there any mystery in what Cheng Nuo said?" ”

Qin Fen was a little anxious and explained: "Cai Gong, you don't know, we have a course in number theory in Peking University, and what we study is the nature and laws of numbers. ”

"Algebra only knows, and number theory is also known, but when put together it is called algebraic number theory, this is the first time we have heard of it."

Cai Yuanpei looked at Feng Zuxun, the senior of the mathematics department, and the other party also nodded, agreeing with Qin Fen's point of view.

"It's not just two people, I'm sure my domestic counterparts haven't heard of it."

Unexpectedly, as soon as he came up, he suppressed the first and second leaders in the school's mathematics door, and after a short period of shock, Cai Yuanpei was also very happy, but he didn't expect to invite a cross-river dragon.

In this way, the more he looked at Cheng Nuo, the more satisfied he became, and said with a smile: "Zhiyuan, can you tell us a story or two here?" ”