Li Yu was ready in one step: "Let's just grow the carriage."
The shopkeeper beamed: "Good taste. The material of the long-shaft cart is good, but it is also much more expensive. The body is 120 taels of silver."
Well, it turns out that what you buy is not as good as what you sell!
Unknowingly leading yourself into a consumption trap~
Li Yu continued to bargain: "60 taels?"
The store owner actually said directly: "Deal!"
I went and cut him in the middle, it was so refreshing, but I still fell into it.
In any case, Li Yu is now a serious family who owns a house and a car, and he can be regarded as a well-off Beipiao.
However, the maintenance cost of this thing is much more expensive than buying a BMW. After all, it is a living horse, and it cannot be filled with gasoline.
Li Yu said to Zhao Qian: "You will be very busy in the future. You must learn to drive a carriage and take care of the horses."
Zhao Qian said carefully: "Such an expensive horse must be taken care of! Don't worry, sir, I won't let it lose a hair. If it doesn't work, I will sleep with it in the stable!"
What Zhao Qian said also made Li Yu realize that after buying the horses and carriages, they took up more space. It seems that they have to rent a house next to the house as a stable. Otherwise, if they really put the two horses in the courtyard,
The taste is also a bit too big.
Just like buying a new car, Li Yu couldn't help but get on the horse and go home immediately.
Zhao Qian spent a lot of effort to lift the rickshaw into the carriage, and then pulled the carriage home.
He still doesn't know how to sit in a car and drive a carriage. It's really a technical job that can't be mastered immediately. It will take at least some practice to master it.
However, Zhao Qian's mood was as good as Li Yu's, and he was promoted to a level.
After Li Yu returned home, he arranged for Uncle Wang to go to the teahouse to find Cui Laosan to rent three private houses next to his courtyard. This was much cheaper than the courtyard house, only 2 dans a month.
After finishing all this work, Einstein's telegram also arrived:
"Dear Mr. Li Yu, I am very surprised to receive your reply so quickly. To make a long story short, what I am currently thinking about is the issue of the speed of light. If the speed of light remains unchanged, can it be extended to different inertial systems?"
Li Yu replied: "I also firmly agree that the speed of light remains unchanged, no matter how the reference system is transformed. But different from the conventional mechanical system, to ensure that the speed of light remains constant, a new transformation method must be introduced, and there is a fixed constant in it.
It is the speed of light, which is the mathematical method created by Professor Lorenz."
The content of the telegram cannot be too long, but Li Yu made it very clear, and Einstein must have understood it.
Li Yu originally didn't want to touch upon the theory of relativity, but now that Einstein himself has approached him, he might really become the co-founder of the special theory of relativity.
However, although the special theory of relativity is still far less important than the general theory of relativity, its popularity is much higher.
As we all know, special relativity has two basic assumptions:
The speed of light in a vacuum is the same in any inertial reference frame;
The laws of physics are the same in any inertial reference frame.
The subsequent special theory of relativity is based on these two assumptions, just like Euclid derived the entire "Elements of Geometry" through five postulates.
Of course, the modification of the fifth postulate has led to two huge non-Euclidean geometries, among which Riemannian geometry has deeply influenced the general theory of relativity. This is a story for another time.
Now Li Yu has directly pointed out that the most critical of the two assumptions is that the speed of light remains unchanged. This point alone is already very advanced.
You must know that as early as 1887, Michelson and Morley confirmed through the famous Michelson-Morley experiment that the speed of light is the same in different inertial systems and in different directions, thus denying the ether hypothesis.
But there are still very few people who believe this, because this experiment can be said to be shaking the entire building of physics.
It is precisely because of its amazing potential "destructive power" that it was rated as one of the "two dark clouds" by Lord Kelvin.
Li Yu also pointed out the transformation method, that is, how to explain the constant speed of light, which is even more precious.
However, the telegram was too short, and Li Yu could only express his ideas for the time being.
But this is also very surprising. I don’t know how Einstein would respond after seeing it.
Li Yu was not in a hurry, because according to the historical process, Einstein would not propose the complete special theory of relativity until 1905.
So although the two people currently communicating via telegram for this kind of scientific discussion only communicate once or twice a day, it is actually very fast.
Having said this, the mid-term exams at the Capital University are about to begin.
The other students were very nervous, but Li Yu was calm and relaxed.
As for why, of course the question is too simple.
As mentioned before, the arithmetic questions in the entrance exam are almost at the level of elementary school mathematics application questions. Although this time it is a little more difficult, it is at best the level of first-grade mathematics.
Other subjects such as physics, chemistry, and geography were not difficult for Li Yu, as they were all junior high school knowledge.
It's just that the Chinese studies question was really difficult for Li Yu. It was really difficult. He didn't even understand the question very clearly:
Gu Tinglin's thesis must have the purpose of the Six Classics, and the task at that time is to try to explain its explanation.
What is the role of classification and writing in the Six Classics?
Li Yu only knew that Gu Tinglin was Gu Yanwu, and he also knew Gu Yanwu's saying "every man is responsible for the rise and fall of the world", and some of Gu Yanwu's life, but how could he possibly know what Gu Yanwu had said in Confucian classics.
Unfortunately, I will probably fail this subject again!
Tragedy, it seems, is going to become a "good (xiao) word (hua)" again.
Fortunately, Ding Yuliang and principal Zhang Baixi knew what level Li Yu was, and he was already an imperial master after all.
So Ding Haoliang found some test questions from American universities and gave them to Li Yu.
Li Yu was much more comfortable with this kind of serious questions in modern universities, but Ding Haoliang was really ruthless and chose some of the most difficult questions from the University of Chicago or Yale University graduation exams.
But Li Yu is a person who has been beaten in exams for many years. Mathematics was not covered in the postgraduate entrance examination back then, so he can completely handle this level of difficulty.
Moreover, Li Yu also used his strengths in Japanese, German, and English to gain extra points in other aspects, so he was still ranked first in the end.
But he really failed in Confucian classics! Li Yu really wanted to give up...
The most you can do is memorize more ancient Chinese prose, then lie down!
In short, once this exam is over, Li Yu can continue to be cool again.
After the results were released, principal Zhang Baixi also found Li Yu. Li Yu thought he was getting some kind of reward, but Zhang Baixi said to him: "During this period, I carefully read the education paper you wrote for the entrance exam. The more I read, the more exciting it became.
There are a lot of things that I think can be adopted into the university classroom.”
At that time, Li Yu wrote exactly based on how he went to school in his previous life. It was all personal experience, and he must be familiar with it, so he asked: "Which point should the principal adopt?"
Zhang Baixi said: "I saw in your article that physical education should be valued starting from elementary school. I thought about it and it does make sense, but the specific system and curriculum details have not been figured out yet."
Physical education classes are definitely the students’ favorite. Unexpectedly, Zhang Baixi mentioned this, and Li Yu agreed very much: “The principal is so right! As for the content of the physical education classes, it is very simple, it is nothing more than track and field and ball games.
Have you ever heard of the Olympic Games? They have been held twice now."
Zhang Baixi said: "I have only heard about it briefly."
Li Yu said: "As long as you have heard of it, the physical education classes will be based on those set by the Olympic Games, such as running and high jumping. By the way, there is another more interesting one, I almost forgot about it."
Zhang Baixi didn't expect that Li Yu had so many ideas, so he continued to ask: "What's interesting?"
Li Yu said: "There is a ball game that is very popular in Europe today, called football."
"Football?" Zhang Baixi really had never heard of it.
Li Yu thought for a while and said: "You can understand it as a sport that existed in our country before - Cuju."
Zhang Baixi knew Cuju as soon as he heard about it, "It is said that Gao Qiu, a minister of the Song Dynasty, was a master of Cuju. This kind of sport may have the appearance of ruining the country."
Li Yu said: "It wasn't Cuju that destroyed the country. Song Taizu also liked Cuju! And the football I'm talking about is a little different from Cuju. It's very popular in the West now."
Zhang Baixi said: "If it is beneficial to school construction, it can be introduced."
"Of course it's beneficial!" Li Yu said, "The second Olympic Games that just ended more than two years ago included football as an event."
Zhang Baixi also trusted Li Yu, and heard that such a grand sports event also had a football event, so she asked with the mentality of giving it a try: "What does this football look like?"
Li Yu said: "There may not be one in the capital, but I think there must be one in the British Concession in Tianjin. Let them ask and they will find it soon."
Modern football originally originated in the UK. Needless to say, the British love football. Their concession is so large that they must have brought football here long ago.
Historically, the Capital University had a football team very early on, and Li Yu liked playing football in his previous life, so he was also willing to introduce it to the University.
It’s just that the follow-up to Chinese football is really hard to describe.
But now the whole of East Asia has not had much exposure to football. Maybe Li Yu can lead the Capital University football team to beat Japan and South Korea...
By the way, there is no South Korea yet. We should say North Korea, let alone North Korea.
Zhang Baixi said: "It seems that you know football very well. You can worry about asking about this."
Li Yu said: "No problem! In addition, our school can also hold sports meets, which is also a routine practice in Western universities."
Zhang Baixi nodded: "This suggestion is very good, I will adopt it."
Historically, the Capital University would not hold its first sports meeting until two years later, so Li Yu pushed for it to start early.
Sports are definitely beneficial to the university, and the body is the capital of revolution!
Later, Tsinghua University even shouted the slogan "Fifty years of working for the health of the motherland." Moreover, Tsinghua also attaches great importance to sports, and those who fail in sports cannot even graduate.
This naturally urges everyone to exercise, but who can say that there is anything wrong with exercising.
Li Yu has a little bit of fun in his heart: material life is too scarce now, and Li Yu is not a nerd. The introduction of football can really make school life happier.