Strictly speaking, the brain is responsible for thinking and the hands are responsible for writing.
A complex and extremely rigorous proof process gradually appeared on the blackboard. This was a theorem formula based on the sieve method of analytical number theory. After Yu Hua successfully gave the proof process of 5+74 and 4+9, Hua Luogeng nodded with satisfaction. The entire proof process can be It was verified that Yu Hua indeed did not carry the study with him.
Later, based on the proof results on the blackboard, Hua Luogeng began to explain the theorem applications and key knowledge about the sieve method, and then related the entire analytical number theory system through the sieve method to improve Yu Hua's mathematical level.
Today, Yu Hua is just a beginner in analytic number theory. He has not yet reached the stage of engaging in cutting-edge mathematical research and still needs to lay a foundation.
Of course not. If compared horizontally with other students, Yu Hua is ahead by more than a tiny bit. He has mastered all the knowledge points in the four years of undergraduate study.
Strictly speaking, Yu Hua, who seems to have just become a college student, is actually studying for a master's degree in mathematics with Hua Luogeng.
The study room exudes the unique atmosphere of knowledge. Each piece of profound knowledge containing extremely high information entropy is being transmitted at a speed of 30b/s, continuously entering a brain with 500 million calculations per second for cognition and analysis. , understanding, finally...
create.
This is a sacred moment of knowledge transmission.
Knowledge itself is a truth that applies to the entire universe—mathematics.
Racial language may become a barrier to communication between civilizations, but mathematics and physics will not. This is the universal language of the entire universe.
The next day.
In the early morning, the sky is slightly bright.
Yu Hua, who studied number theory with his master Hua Luogeng until late at night, wore a black Chinese tunic suit and left the house early. The main schedule today was to visit Mr. John Rabe to lay a good foundation for the future idea of replacing technology with equipment.
They packed up the Y-shaped armored steel concept presentation materials and left the west courtyard, heading for the east gate of Tsinghua University without passing through the south gate or west gate. Mr. John Rabe's identity as a German is very sensitive, and he needs to avoid the organization when visiting.
In the school, the organization cannot arrange personnel to protect them. Only when they leave Tsinghua Campus can the protective force appear.
Yu Hua, who is extremely vigilant and has the best anti-reconnaissance ability in the world, left Tsinghua University through the east gate, then entered the complicated alleys, walked around five or six times to the main road, and hailed a rickshaw. Go straight to Dongcheng District.
The blue sky is as clear as a wash, cloudless, and the blue sky is clear and clear.
Dongcheng District, Jianguomen, Dongtang Hutong entrance, Room No. 11.
Room No. 11 is located in the middle of Dongtang Hutong. The entire house faces Dongjiaomin Lane. More than 150 meters away, you can see the German Pavilion in Dongjiaomin Lane.
This house is not a classical traditional courtyard house, but a two-story detached building with a strong German classical architectural style. There is a lawn in front of the house and a garden next to it. There are servants mowing the lawn in both the lawn and the garden.
The Dongjiaominxiang area has always been clean and tidy. Compared with the dirty and messy Nancheng District, it is a completely different world.
"This is where Mr. Rabe lives. I hope it will have a good start." Yu Hua, wearing a black Chinese tunic suit, looked at this classical building with hope in his heart. After taking a deep breath, he stepped forward and rang the doorbell.
Soon, the house door opened.
A middle-aged woman wearing a pale pink dress appeared and walked towards the iron gate slowly and slowly. She had white skin, blue pupils, and delicate and delicate skin. She was slightly different from Western women with large pores, and she had a... A noble temperament.
When Yu Hua saw this middle-aged woman, he vaguely guessed her identity. If nothing unexpected happened, she should be Mr. Rabe's wife.
This beautiful middle-aged woman came to the iron gate, saw the gentle Yu Hua, and looked at her carefully. Yu Hua's smile did not make her feel any malice, she nodded lightly, and then used Nanjing's not-so-standard He said: "Hello, who are you looking for?'
Yu Hua smiled and said in fluent and standard German: "Hello, madam, my name is Yu Hua. I am a student at National Tsing Hua University. I came here today to visit Mr. John Rabe. I wonder if Mr. Rabe is at home.
After saying this, he took out his student status card, opened it, and placed it in front of the middle-aged woman to check her identity.
'You actually speak German?'
Hearing Yu Hua's extremely standard German, the middle-aged woman was slightly surprised. She looked at Yu Hua's student status card, nodded affirmatively, and immediately switched to her native language: "Hello, classmate Yu Hua, my name is Daura Rabe, you can Call me Daura. Rabe is out today on business and will be home in about an hour. You can come in and wait.'
With his student status card and fluent German, Yu Hua instantly captured Daola's trust.
In Daura's view, there are many scammers in this era, but there are almost no scammers who can speak German and have a Tsinghua University student card.
"It turns out to be Mrs. Daola, the students are polite." Yu Hua showed a surprised expression, and then bowed and saluted.
"Classmate Yu, please come in." Daola showed a kind smile, then opened the iron door and motioned for Yu Hua to come in.
It must be said that her first impression of Yu Hua was excellent. Over the years, except for Rabe, she had rarely communicated in her native language.
However, because learning Chinese is very difficult, Daura's Chinese proficiency has never been very good, so that on many occasions, she was too reluctant to speak and only responded with a smile.
"Thank you, madam." Yu Hua politely thanked her again and walked into the courtyard without delay.
The two of them entered the house together and came to the main hall. Mrs. Daola arranged for Yu Hua to sit down, then went to the kitchen and made a cup of tea.
"You are Chinese, you should like drinking tea, classmate Yu, why are your German so good?" Daola came with the hot tea, put it in front of Yu Hua, and then asked curiously
"Thank you. I personally have a good talent for languages and I learn very quickly. I learned German from my high school English teacher, who was also taught by my physics teacher Davis. These two teachers played a big role in my foreign language proficiency. Help." Yu Hua thanked him and took the hot tea. Feeling Daola's curious eyes, he replied with a smile.
"Davis? Oh my god, you are a student of Peking No. 4 Middle School?" Daola heard this and caught the name Davis keenly, and was a little surprised.
Davis was a close friend of his husband. He worked as a physics teacher at the No. 4 Middle School in Beiping, China. He graduated from Heidelberg University and studied under Max Planck.
As far as Daura knows, Peiping No. 4 Middle School is one of the best high schools in China. The students who can attend this school can be said to be one in a million, and they are all geniuses.
Yu Hua affirmed with a smile, and his words showed a hint of gratitude: "Yes, madam, I am a student of Peking No. 4 Middle School. Mr. Davis taught me a lot of precious knowledge."
Davis may not be a top physicist, but he is definitely a top physics teacher, knowledgeable, with extremely solid basic knowledge, excellent experimental capabilities, and strict requirements on students.
A considerable part of Yu Hua's foundation in physics relies on Davis.
"Yu, then you should be a very good genius." After hearing these words, Daola had to give his own praise. As a German who has lived in China for decades, Daola knew very well that Peking's fourth The weight of middle schools and National Tsinghua University.
The young man in front of me studied in one of the best middle schools in China in middle school, and in college he studied in one of the best universities in China.
"You are exaggerating, madam. I just entered the door and saw a lot of luggage on the corridor. What is this for?" Yu Hua smiled, and then asked with concern. When he entered the door just now, he saw a lot of luggage on the corridor. and items.
When Mrs. Daura heard this, she did not hide anything and said, "That's it. Rabe is going to move back to his residence in Nanjing in three days." Moving?
When Yu Hua heard the news, he was stunned for a moment and frowned slightly. He didn't expect to get this news when he visited today.
It must be said that Rabe's arrangement to move back to Nanjing was a surprise to him. Yu Hua knew that Rabe would return to Nanjing, but he did not expect that this situation would come so suddenly.
"Yu, what's wrong?" Daola asked after seeing Yu Hua's expression.
'Nothing, ma'am.'
Yu Hua came back to his senses, relaxed his brows, raised his head and smiled.
"He will be back soon. Just wait a moment. I will go work first." Seeing this, Daola did not continue to ask questions, explained, stood up and left.
I can't wait any longer. The plan to replace technology with equipment needs to be carried out in advance. With my current status, I can barely match the Y-type armor steel formula.
Do your best to realize this plan.
After Daola left, Yu Hua picked up a sip of hot tea and took a sip. His eyes were in a trance, and his computer-like brain entered high-speed operation, thinking about the problem.
Yu Hua's original plan was to use the academic achievements of 'asymmetric cryptography' to enhance his identity and influence, and then find Rabe to exchange technology for equipment.
However, things backfired, and reality always conflicted with plans. Faced with Rabe's return to Nanjing in three days, Yu Hua had to implement the plan to replace technology with equipment in advance.
"It seems that the only way to advance this visit is to make a slight change..." Yu Hua thought silently, and after making a decision, he immediately changed his current strategy. The main excuse for visiting Rabe this time was to purchase a needed Experimental equipment, by the way, the concept of Y-shaped armor steel is given, hoping to arouse Rabe's interest.
But now this excuse no longer works. Yu Hua is going to go straight to the point and use the excuse of lack of funds to develop Y-shaped armor steel to arouse Rabe's interest.
Time passes minute by second
"Squeak!" About an hour later, the door of the house opened, and Rabe, who was wearing a suit, entered the house with his male secretary.
"We should pay attention to the popular Qiming lanterns in major middle schools in Peking. I think this new concept of movable and portable lamps has very broad commercial application value. In addition to the student group, teachers, workers, scientists, and business people are interested in this kind of portable lamps." Portable lamps all have lighting needs. The global market value of such movable lamps may be as high as about one billion U.S. dollars. If we have a breakthrough in battery technology and abandon the heavy and bloated batteries of the light bulbs, and still have rechargeable functions, then it can The practicality of mobile lamps will be greatly improved, and by then, the entire market share will be owned by Siemens... Daura, pour me a glass of water."
After returning home, Rabe kept talking, his face focused and serious, and his mind made judgments and evaluations about the enlightenment lamp. After finishing speaking, he shouted into the room.
The male secretary next to him held a shorthand pad and pencil and quickly recorded Rabe's words.
This morning Rabe went to the Siemens Peking Company to inspect the lanterns that have become popular in major schools in Peking. This kind of lanterns originally originated from Peking No. 4 Middle School. The technical content is not high, but the design concept is very good.
It can be carried and used at will, has a charging function, and can provide emergency lighting for at least three hours when the power supply is lost. Rabe is keenly aware of the commercial application value of this movable lamp concept.
In Rabe’s view, if there is a breakthrough in battery technology and the size of movable lamps is reduced from a box to about the size of a cup, and the cost is reduced to 10 yuan or 2 US dollars each, then this new type of electric lamp will provide Siemens with Incredibly generous returns.
Scientists, students, teachers, workers, businessmen, government departments, it can be said that a variety of industries and departments all have lighting needs.
Rabe took off his coat and was about to change his clothes. Suddenly, he spotted Yu Hua sitting on the sofa.
When their eyes met, Rabe was a little stunned. He didn't expect that there would be guests at home today. Looking at Yu Hua's face, he felt that it was very familiar.
"Hello, Mr. Rabe, I am Yu Hua, a student of Mr. Davis. I have met him on the road before. You handed me a business card." Yu Hua stood up, smiled, and came to Rabe. In front of Bei, he extended his right hand and introduced himself.
After hearing Yu Hua's self-introduction and speaking extremely standard German, Rabe's relevant memories of Yu Hua immediately appeared in his mind. He smiled sincerely and stretched out his right hand: "So it's you, classmate Yu Hua.
The two right hands are held together as a courtesy, and then separated naturally.
The male secretary standing nearby in charge of recording was a little confused. This was the first time he heard such standard German from a Chinese speaker. "Rabe, classmate Yu has something to ask you." At this time, the lady in the room, Dora, came out with a glass of cold drinks, came to the two of them, and reminded Rabe.
After finishing speaking, he put down the water glass, turned around and left, leaving space for the two of them to talk.
"I'm sorry, classmate Yu. I was just talking about things in the company. I didn't notice you the first time I walked in." After hearing this, Rabe felt confident. He picked up the water glass and took a sip to relieve his thirst. Then he smiled and said .
"It's okay, Mr. Rabe, I thought you were talking about an electric light called a Qiming lantern just now, right?" Yu Hua said with a smile.
With an extremely keen ear, he obtained a lot of key information from a series of words Rabe said when he came in. For example, Siemens was very interested in the Qiming lamp, which was the prototype of a desk lamp, and according to Rabe's description, it could be proved that Siemens had obtained An enlightening lamp.
It is interesting that Siemens is interested in Qiminglan.
Don't forget, he is the inventor of the enlightenment lamp.
"Yes, what's the matter? Student Yu." Rabe was a little confused after hearing this and asked.
Yu Hua smiled and said: "Mr. Rabe, if I say that I am the inventor of the Qiming Lamp, would you believe it?"
