Chapter 171 The Heart of the Country

"Speaking of which, have I told you my home address?"

After placing a cup of hot tea in front of Wu Bin, Bi Wanqing sat across from him and asked.

"Hey, I investigated secretly, just to give you a surprise." Wu Bin said while looking around.

I found that his teacher's home was very simple and simple. Apart from the two small square chairs where the two of them sat, there was only an Eight Immortals table and a 26-inch TV in the living room. It was almost as simple as his grandfather's home.

"I'm interested." Bi Wanqing took a sip of tea, then looked at Wu Bin and said, "I'm familiar with Pu'er tea, try it and see if you get used to it."

"I'm used to drinking tea. My grandpa also likes to drink tea. I drank it every day when I was a child, and gradually I started to taste the aroma of this tea." After Wu Bin finished speaking, he took a sip, closed his eyes and thought about it for a moment, and said, "Well, good. Tea."

"Look at how pretentious you are." Bi Wanqing smiled and shook his head.

"Oh, by the way, Teacher Bi, I brought the gold medal." Wu Bin took the gold medal out of his pocket and handed it to Bi Wanqing's hand.

He had already called the two teachers at the end of the organizer's dinner and told them the good news.

When Bi Wanqing was looking at the gold medal, Wu Bin told him some interesting things about IPhO, as well as the question-setting trends and various question-answering techniques in the past two years. It was regarded as a gift from him as an experienced person to the students in the competition class in the future.

"Stay and eat. Your aunt should be off work soon."

After drinking a pot of tea, Bi Wanqing looked at the clock on the wall and said to Wu Bin.

"Although I do need to pay a visit to my wife, I still have to go to Teacher Cai's house. How about I meet you next time I come here?"

"Okay." After Bi Wanqing finished speaking, he sent Wu Bin to the door, patted his shoulder and said, "I won't say anything about continuing to work hard. University should be your real stage. I believe you will get better. The further you go, the better.”

"Teacher, you also need to take care of yourself. Don't overdo it just because you are leading a competition class."

"Don't worry, I know my body well." Bi Wanqing nodded.

"Then...I will come to see you again, goodbye." After saying this, Wu Bin waved and walked down the stairs.

Teacher Cai's home is not far from here. Wu Bin stopped by the supermarket to buy some dried fruit gift boxes and a carton of milk and soon arrived there.

After ringing the doorbell of 804, a mature female voice came from the intercom.

"Hello. Who is this?"

"Hello, my name is Wu Bin. I am Teacher Cai's student. Is he here?"

"Oh, here it is, come on."

After opening the door, Wu Bin took the elevator to the 8th floor and met Cai Guoping with a smile on his face.

"Oh, our international champion is here, Peng Pi is shining brightly."

Cai Guoping laughed and said.

"That's not all because of your good teaching, teacher." Wu Bin said, handing over the two boxes of gifts in his hand, "My mother asked me to bring these specially. They are all snacks, and I asked the teacher to accept them."

"Oh, this kid is really good at talking. No wonder our Lao Cai says hello to you all day long." At this time, an aunt in an apron came out and greeted Wu Bin and said, "Come in quickly, we just made a table of dishes. "

"Hello, Master." Wu Bin immediately called politely.

"Oh, don't call me Master, just call me Auntie."

"Hey, auntie."

After saying hello, Wu Bin and Cai Guoping walked into the living room together. Compared with Teacher Bi's home, the decoration in Teacher Cai's home was warmer. All kinds of furniture were available. There was also a picture of him and him hanging on the wall. My wife’s wedding photos are very sweet.

"You just returned to China. If you don't have a good rest at home for two days, why are you here?" Cai Guoping said, opening the refrigerator door next to the kitchen, looking at Wu Bin and asking, "Coke or iced tea?"

"The Coke is ready."

Cai Guoping nodded, took out a can of Coke from the refrigerator and threw it to Wu Bin.

"I just wanted to bring you the medal as soon as possible." Wu Bin said after catching the Coke.

"What's so good about a broken medal?" Cai Guoping opened a can of beer and took two sips: "In the future, when you discover any new particles or new substances, bring them to me to see, then my life will not be in vain. "

But then the mistress immediately walked out of the kitchen and said, "My kid brought a gold medal specially for you to see. What are you talking about?" Then she turned to look at Wu Bin, "He is like this, no. To be honest, I’m always telling me at home how great a student is, but you are his student, so you probably know his temper quite well, right?”

Wu Bin smiled and nodded.

"Hahaha, just understand. Do you like sweet and sour food?"

Wu Bin nodded again.

"That's good. Sit down for a while. The food will be ready soon." After finishing speaking, the mistress returned to the kitchen.

Cai Guoping, who had been silent until now, pointed to the kitchen and made a scary look with his teeth and claws, making Wu Bin laugh non-stop.

Cai Guoping also laughed for a while, came over with a beer and sat next to Wu Bin and asked: "Tell me, what are the more interesting test questions in IPhO this time?"

"Is it interesting... The relativity correction question of Youdao GPS system is quite interesting."

"Oh? Just wait a minute." Cai Guoping said and walked back to the room, took out paper and pen and put them on the table. "It's interesting. Let me see the explanation."

"Okay." Wu Bin nodded.

While Wu Bin was writing a topic for Cai Guoping, Mrs. Cai came out with a plate of pomfret with tomato sauce, put it on the table, looked at the two people who were serious about the topic, smiled, and went back to the kitchen.

"So assuming that there is only the earth's gravitational field around the earth, no interference from other gravitational fields, and the earth's gravitational field is statically distributed, we can formulate a formula based on the Schwarzschild solution."

After hearing this, Cai Guoping nodded thoughtfully, pointed to the paper and asked: "So if the derivative here is less than 1, it means that the satellite clock of special relativity runs slower than the clock on the ground. If the derivative is greater than 1, it means that the satellite clock of general relativity runs slower than the clock on the ground. Do you always walk fast on the ground?"

"Well, now that we have the physical formulas, we can just plug in the relevant data and do the calculations."

"It's interesting..." Cai Guoping said, moving the paper in front of him, "Give me the pen and I'll do the math."

"Okay." Wu Bin nodded and handed the pen to Cai Guoping.

As soon as Cai Guoping listed two lines of formulas, he heard Mrs. Cai coming out with another pot of short rib soup and said with a smile: "Looking at it this way, I don't even know who the teacher is between the two of you."

After hearing this, Cai Guoping said indifferently: "This kid is good enough to be my teacher now. There is nothing wrong with him."

"Don't dare, don't dare, teacher, you are not ashamed to ask." Wu Bin immediately waved his hand.

But Cai Guoping immediately patted Wu Bin's head lightly and said, "Stop talking nonsense. Just say you are good and you can do it. Let's see if that's the case."

"Okay, okay, you two academicians, let's eat first. It's not too late to discuss it after dinner."

"It'll be ready soon." Wu Bin and Cai Guoping said in unison.

Mrs. Cai could only smile and shake her head, sit down and eat first.

Ten minutes later, Wu Bin, who wrote the last line of calculations, put down his pen and said: "This means that the general relativity time on the satellite is faster than the clock on the ground."

"Because the gravitational field of landmarks is stronger than that of high altitude, right?" Cai Guoping nodded.

"Well, so in practice the relativistic correction of the GPS system is the result of the special relativistic effect and the general relativistic effect."

After hearing this, Cai Guoping thought for a while, nodded and said, "This question is indeed a good one."

"Can we eat now?" Mrs. Cai asked with a smile.

"Eat, eat, give this kid more food." Cai Guoping put the paper and pen aside and said happily.

"I'd better do it myself." Wu Bin said and was about to stand up, but was immediately pushed down by Mrs. Cai.

"Everyone who comes is a guest. There is no reason to let the guests serve their own meals. Just sit down."

"Thank you, Master, oh no, Auntie."

Mrs. Cai covered her mouth and smiled, and said, "If you really feel that Mrs. Mrs. speaks well, you can just call me Mrs. Mrs."

"Wow, my wife is so kind. Teacher, you are so lucky." Wu Bin looked at Cai Guoping and said.

"That's right, this is your wife." Cai Guoping said and gave a thumbs up.

Wu Bin also smiled and nodded.

During the meal, Wu Bin was shocked by Mrs. Cai's cooking skills. He originally thought that Mrs. Pei's sweet and sour short ribs had a perfect balance of sweet and sour, but he didn't expect that there would be a better one!

This Pomfret in Tomato Sauce is so delicious that you won’t even want to slap it in the face!

However, after quickly finishing a bowl of rice, Wu Bin was a little embarrassed to add more rice, so he just stared at the empty bowl blankly. The dilemma made Mrs. Cai laugh so hard that she took Wu Bin's empty bowl and left with a smile. Went to the kitchen.

"Thank you, Master..." Wu Bin smiled shyly after taking the full rice bowl.

"Come here often if you like, you're welcome." Mrs. Cai couldn't help but touch Wu Bin's head, expressing her love for this shy boy.

After eating, Cai Guoping pulled Wu Bin to sit on the sofa next to him. While watching the news broadcast, he asked Wu Bin: "How are you? Have you decided what major to study?"

"HKUST does not restrict the choice of majors. As a freshman, in addition to modern physics and optical engineering, I also plan to take classes in materials science and polymer science. In addition, I am also interested in engineering and information technology. If I have enough time, I They should all go to the lectures.”

"Do you have a goal?"

"Goal? To get full grade points?"

Cai Guoping raised his hand and wanted to give it to Wu Bin, but in the end he held back, "After all, he is also a person who has won the IPhO gold medal. Can you set a bigger goal?"

"Oh, yes! I plan to do something in physics, such as combining quantum mechanics and general relativity into one to obtain a unified theory."

"Study superstring theory?" Cai Guoping asked.

"It's possible, but it's not just that."

"Hahaha, this goal is good, very good!" Cai Guoping patted Wu Bin hard twice, "As long as you solve it, the dynamite award will definitely be yours. Oh! If you can win the dynamite award, I tell you, I go out in the car every day with a loudspeaker to promote.”

"Do you want to publicize that he won the Nobel Prize, or do you want to publicize that the person who won the Nobel Prize is your student?" asked Mrs. Cai who was clearing the table at the side.

"Of course it goes without saying that this guy is my student." Cai Guoping said so confidently.

"You are so shy." Mrs. Cai smiled and poked him with her finger.

"It's a fact." After Cai Guoping finished speaking, he continued to turn to look at Wu Bin, "There are goals that are far away, but there are also goals that are close. Didn't you just say that you are also interested in materials science?"

"Yeah." Wu Bin nodded.

"Then I will personally give you a development direction and study the "heart" of the machine."

"Heart...dirty? Engine?"

"Yes, it's the engine, and if you want to study it, study the most high-end aeroengine! Alas! Our country has tried its best for more than half a century, but it has not yet built a mature and reliable core aircraft."

"Without bragging, aviation represents a country's most sophisticated, powerful, and technologically intensive field. It can be called the crown of modern industry, and the jewel in the crown is the engine."

When Wu Bin heard the word "engine", he couldn't help but think of Zhao Kehan. This guy went to Jinghua to learn this. I wonder if he has set his goal at this level.

At this time, Cai Guoping suddenly slammed the table, his mood was a little impassioned, "Why is my country's first large aircraft C919 equivalent to the Boeing 737 50 years ago!? Why is there a gap of about 10% between the J-20 and the F-22? ? Isn’t it just that it’s restricted by the engine?”

"The fourth-generation military low-bypass-ratio high-thrust turbofan engine, the fifth-generation military non-geometry structure conversion variable-cycle turbofan engine, high-power turboshaft and turboprop engines..."

Wu Bin was a little surprised when Teacher Cai recited the names of engines one after another like a treasure trove. This was the first time he knew that this teacher knew so much about aerospace.

"There is also an F119 engine with a thrust of 156 kN! Why can the F-22 do so many incredible body movements in the air? It is because it is equipped with two of these!! It has become the only one currently A fighter jet that can cruise at supersonic speeds without using afterburner is impressive."

"It's indeed cowhide." Wu Bin nodded.

"So I was thinking, since you want to learn more things during your freshman year, then set a small goal and learn all about engine subjects."

After listening, Wu Bin's eyes couldn't help but gleam, and he nodded vigorously and asked: "At least you have to learn aerodynamics, fluid mechanics, mechanical design, etc., right?"

"Seeing your reaction... I feel relieved." Cai Guoping laughed twice, "Moreover, aircraft engines need to work under harsh conditions of high temperature, high pressure, high speed and high load, and they must also meet High power, light weight, high reliability, good safety, long life, low fuel consumption, low noise, and low pollution emissions are very demanding and contradictory requirements.”

As he spoke, Cai Guoping began to crack Wu Bin's fingers, "Look, you have to learn high temperature, aerodynamics and thermodynamics, right? You have to learn high pressure, high speed, and structural mechanics, right? How to realize these contradictory requirements together? Mechanical design, You have to learn mechanical processing, metal materials science, refrigeration, precision machining, smelting and casting, etc., right? And just knowing a little bit about it is useless, you have to learn everything."

"Yeah." At this time, Wu Bin could only nod.

PS: There will be an additional chapter later. In addition, the guy who uploaded the character picture to Pei Jiamin in the character area is awesome! It can be said to be quite great.

In addition, if you have any other suitable character pictures, you can also upload them for a look. Thank you for your support.