In the advanced mathematics class, Yang Rui listened very carefully.

Although some people can learn advanced mathematics through self-study, it is really only some people. In fact, there are many ways to learn mathematics, but it is only suitable for a very small number of people.

For example, the famous Mr. Hua Luogeng has a very distinctive way of reading. When he got a big math book, Hua Luogeng's method is to first look at the previous pages, then close the book, close his eyes and contemplate, and then turn directly to the last page of the big one to see the answer. If the answer is correct, you have read this book.

This way of reading is really efficient. Hua Luogeng himself has read countless books in this way, but in reality, there are really few people who can use this method.

Yang Rui has no mathematical talent and does not pursue mathematical skills at high levels. He just needs to reserve some math.

Historically, although some creatures have extremely strong mathematical skills, this is not a necessary condition.

In Yang Rui's opinion, although a creature like a mathematical genius is rare, it is not uncommon on university campuses. You can just find it as you like. For example, an ordinary genius like Zhao Pingchuan who is not even a mathematics major is enough to use in ordinary biology laboratories.

However, Yang Rui's math reserves are still far from enough. If he is lucky enough to study at Peking University, he will not waste any chance. No matter how busy he is in the laboratory, he always has to take advanced mathematics classes.

At Peking University, the education focus is undoubtedly in undergraduate classes. Almost the best professors, including former academician-level Benz, will try to give lectures to undergraduate classes. This is the elite education that belongs only to the 1980s - the most open attitude, the most free thoughts, the best students, the top professors, and the most concentrated resources.

Such educational quality will be difficult for doctoral students in later generations to enjoy. In fact, doctoral students no longer attend classes. In most cases, doctoral students study during the research process and work during the learning process, which is no different from lecturers and teaching assistants in universities. However, after 30 years, if you want to enjoy the 1980s-style teaching of high-level professors, you can only go to Haval, Cambridge.

Yang Rui was very concerned about advanced mathematics courses, and he would do exercises when he had time, etc. In terms of progress, he was considered a super-satisfied man. After the class, he even ran to the podium to ask the professor.

After all, Yang Rui has studied a lot of people, and there will be no problem in the short term when he goes to advanced mathematics at the first level.

Now professors are happy to answer, and they will leave in a hurry when they don’t know how to get off the get out of class. It’s only four or five years since the college entrance examination resumes. Many professors have just returned to school, which is the time when enthusiasm is bursting...

Yang Rui stayed in the classroom for a long time, but it made Chen Yi and others outside anxious and had to hide behind the classroom to determine Yang Rui's behavior.

When Yang Rui finished the problem and went out, Chen Yi was panicked again and ran away to catch up with him.

"Mr. Yang." Chen Yi came to Yang Rui panting and said: "I have found out about the stamps clearly and made a list. Do you want to take a look?"

"Look while walking."

"Wait a minute." Chen Yi flipped over his shoulder bag and handed a notebook to Yang Rui.

20 sets of "Mei Lanfang" and 100 sets of "Love Science Since Childhood"... Although they are relatively ordinary stamps, they are indeed of high value. For example, Anita Mui's set can be sold for hundreds of yuan in the 1980s.

However, such stamps and quantity are still far from Yang Rui's expectations.

He flipped down casually until he saw the words "Military Mail" that he stopped.

Military mail in the philatelic industry usually refers to "yellow military mail", "purple military mail" and "blue military mail". The most famous of them is Blue Military mail, which was sold at a high price of 800,000 yuan in 1994. As for the entire set of military mail, the price is as high as one or two million.

In Xiao Chen's notebook, the price of this set of stamps is 6,000 yuan, which is more expensive than the 20 sets of Mei Lanfang, but there is much room for appreciation.

Of course, such a complete set of military mail is hard to come by, and it is also excellent to stay.

Yang Rui closed the notebook and asked, "Are these the other party confirmed to sell?"

"Of course, I'm sure I'll sell it."

"I just need to have the full quality and the price is 20% off. I want it all. If I can, I will trade it." Yang Rui handed the notebook back to Xiao Chen and left.

Xiao Chen was stunned for a while, not knowing whether this was good or bad, so he hurried back to report the message.

The next day, another round of bargaining, Yang Rui bought all the stamps of the other party's full-quality stamps for a price of 25% off, which made everyone in the branch office excited.

A transaction worth more than 30,000 yuan is spent in one go, and even the bargaining is not particularly good. Such a rich man naturally feels the flavor of being stupid and making money faster.

Moreover, the original owner of the stamp also bought 2,000 yuan of government bonds to show his gratitude. For the bank director who sold treasury bonds and sold heart disease, this is better than any special medicine. At the same time, he is preparing to introduce more philatelics to Yang Rui.

In school, rumors that Yang Rui earned manuscript fees to buy government bonds were widely circulated.

Since the New Year's Day party, the super-looking Yang Rui has quietly gained attention from the school grass. If someone else bought the treasury bond, at most it would be discussed in this class or department.

It was said that Yang Rui bought the treasury bond, but no matter whether he really bought it, the news flew out in an instant.

Moreover, this has become a hot topic for the next few days.

On Friday, Yang Rui was simply blocked in the dormitory by the student union president.

"Join the Student Union." The chairman also woolen coat, holding his hands in his pocket, said very handsomely: "The Student Union is a student organization and a link between the school and the students. I think Yang Rui, you are very suitable to join the Student Union..."

He said a lot, then looked at Yang Rui with his dark eyes, as if he was waiting for him to bow his head.

For today's students, joining the Student Union is indeed an excellent choice. Because it is still a distribution system now, the student union has the advantage of good distribution first. Although it is not necessarily assigned to a good unit, in the case of choice, student union cadres can always get better choices.

This is a direct benefit, which is completely different from the indirect benefit of future student unions.

However, Yang Rui didn't pursue this at all. He smiled and said, "I'm busy in the laboratory, so I'm afraid I don't have time to be in the student union. I'm sorry."

Laboratory work is an extremely useful privilege, especially Professor Tang Ji's management is relatively loose, so Yang Rui almost raised his banner.

His Excellency the Chairman did not seem to have expected that he would be rejected in person. He was stunned for a moment, then smiled and said, "You better think about it again, let's do it. If you have time, our students will make a call. "

……
Chapter completed!