"Speaking of which, did I tell you the address of my home?"

poured a cup of tea for Wu Bin, and Bi Wanqing sat on a square chair and asked him.

"Hehe, I was secretly investigating, and I wanted to surprise you." Wu Bin said as he looked around.

found that his teacher's home was very simple and simple, in addition to the two square chairs in the living room, there was a table of eight immortals and a 26-inch TV, which was similar to his grandfather's house.

"I have a heart." Bi Wanqing took a sip of tea, looked at Wu Bin and said, "Fresh Pu'er tea, try it and see if you are used to drinking it." ”

"I am used to drinking, my grandfather also loves to drink tea, when I was a child, I drank it every day, and slowly I tasted the fragrance of this tea." After Wu Bin finished speaking, he tasted it, closed his eyes and tasted it for a while, and said, "Well, good tea." ”

"Look at you pretending." Bi Wanqing smiled and shook his head.

"Oh yes, Mr. Bi, I brought the gold medal." Wu Bin took out the gold medal from his pocket and handed it to Bi Wanqing.

Wu Bin had already called the two teachers at the end of the dinner and told them the good news.

When Bi Wanqing watched the gold medal, Wu Bin told him some interesting stories about IPhO, as well as the trend of questions and various answering skills in the past two years, which was a gift from him to the younger students in the competition class in the future.

"Stay and eat, your aunt should be about to get off work."

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

Wu Bin thought for a while and said, "Although I should visit my wife, I still have to go to Teacher Cai's house, or I'll see you next time, right?" ”

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

"Teacher, you also have to take care of your health, but don't boil your body just because of the competition class."

"Don't worry, I have my own body." Bi Wanqing nodded.

"That'...... I'll be coming back to see you, goodbye. Wu Bin waved his hand and walked down the stairs.

Mr. Cai's home is not far from here, and Wu Bin went to the supermarket to buy some dried fruit gift boxes and a carton of milk and soon arrived at the place.

Rang the doorbell of 804, and a mature female voice came out of the intercom.

"Hello, who?"

"Hello, my name is Wu Bin, and I am a student of Teacher Cai, is he here?"

"Oh~ It's here, come on."

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

"Ouch, our international champion is here, it's blooming."

Cai Guoping said with a laugh.

"That's not what you taught well, teacher." Wu Bin said and handed over the two boxes of gifts in his hand, "This is what my mother asked me to bring, they are all snacks, and I ask the teacher to smile." ”

"Ouch, this kid is really good at talking, no wonder my mother's Lao Cai says hello all day long." At this time, an aunt wearing an apron came out and greeted Wu Bin and said, "Come in, I just made a table of dishes." ”

"Hello master." Wu Bin immediately shouted politely.

"Oh, don't call me any wife, just call me aunt."

"Okay, Auntie."

After saying hello, Wu Bin and Cai Guoping walked into the living room together, compared to Mr. Bi's home, the decoration of Mr. Cai's home is warmer, all kinds of furniture are also readily available, and there is a wedding photo of him and his wife hanging on the wall, which is very sweet.

"Just returned to China, why don't you rest at home for two days, why are you here with me?" Cai Guoping said and opened the refrigerator door, looked at Wu Bin and asked, "Drink Coke or iced tea?" ”

"Coke is good."

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

After catching it, Wu Bin said, "I just want to bring you the medal as soon as possible." ”

"What's so nice about breaking a medal." Cai Guoping opened the beer, poured two sips and said: "In the future, if you find any new particles or new substances, you can bring them to me again, then I will not live in vain." ”

But at this time, Shi Niang immediately came out of the kitchen and said, "The child specially brought the gold medal to you to see, what are you talking about?" Then he turned his head to look at Wu Bin, "He's such a person, just like that, dishonest, obviously at home I always told me how good a student is, but you are his student, I guess you know his temper quite well, right?" ”

Wu Bin smiled and nodded.

"Hahaha, it's good to understand, do you like to eat sweet and sour?"

Wu Bin nodded again.

"That's good, then you can sit down for a while, and the dishes will be ready immediately." After speaking, the master went back to the kitchen.

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

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

"Interesting...... The relativity correction problem of Youdao GPS system is quite interesting. ”

"Oh? You 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 a little interesting, show me it." ”

"Okay." Wu Bin nodded.

When Wu Bin wrote the question for Cai Guoping, Mrs. Cai walked out with a plate of pomfret in tomato sauce, put it on the table, looked at the two people who were seriously discussing the topic, smiled, and went back to the kitchen.

"So if there is only the gravitational field of the earth around the earth, and there is no interference from other gravitational fields, and the gravitational field of the earth is statically stacked and distributed, the formula can be made according to the Schwarzschild solution."

Cai Guoping nodded thoughtfully after listening, pointed to the paper and asked: "So if the derivative is less than 1 here, it means that the special relativity satellite clock is slower than the clock on the ground, and if the derivative is greater than 1, it means that the general relativity satellite clock is always faster than the ground clock?" ”

"Well, with the physical formula, you can substitute the relevant data for calculation."

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

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

As soon as Cai Guoping listed the two lines of formulas, he heard Mrs. Cai, who came out with a pot of small pork rib soup, smile and say, "Look at it this way, I don't know who the two of you are the teacher." ”

Cai Guoping said indifferently after hearing this: "This kid is now enough to be my teacher, there is nothing wrong with it." ”

"Don't dare, don't dare, teacher, you're shameless to ask." Wu Bin immediately waved his hand.

But Cai Guoping immediately patted Wu Bin's head lightly, "Don't talk nonsense, just say that you can do it, let's see if that's the case." ”

"Okay, okay, the two universities ask home, eat first, and it's not too late to discuss after eating."

"Right away." Wu Bin and Cai Guoping said in unison.

Mrs. Cai had no choice but to smile and shake her head, sit down and eat first.

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

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

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

Cai Guoping thought for a while after listening, nodded and said, "This question is indeed good. ”

"Then we can eat now, right?" Mrs. Cai asked with a smile.

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

"I'd better do it myself." Wu Bin was about to stand up as he spoke, but was immediately pressed down by Mrs. Cai.

"The visitor is the guest, how can there be a reason to let the guest serve the meal by himself, you just sit."

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

Mrs. Cai covered her mouth and smiled, and said, "If you really think that Mrs. is smooth, you can call Mrs. Cao." ”

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

"That's, your wife is this." 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, originally he thought that Pei's mother's sweet and sour short ribs had already balanced the sweet and sour taste, and he didn't expect that there would be a strong hand!

This pomfret in tomato sauce is so delicious that you can't even slap it!

However, after quickly eating a bowl of rice, Wu Bin was a little embarrassed to add rice, so he looked at the empty bowl in a daze, and the uncomfortable Mrs. Cai couldn't laugh, so he smiled and took Wu Bin's empty bowl and walked to the kitchen.

"Thank you, Mrs. ......" took the full rice bowl, and Wu Bin smiled shyly.

"If you like it, you can eat it often, you're welcome." Mrs. Cai couldn't help but touch Wu Bin's head and expressed her love for this shy boy.

After eating, Cai Guoping pulled Wu Bin to the sofa next to him and sat down, and asked Wu Bin while watching the news broadcast: "How is it, have you decided what major to study?" ”

"In my freshman year, in addition to modern physics and optical engineering, I also plan to go to materials science and polymer science, and I am also interested in engineering and information technology, so if I have enough time, I should go to lectures."

"Is there a goal?"

"The goal? Do you have a full grade point? ”

Cai Guoping raised his hand and wanted to give Wu Bin a look, but in the end he held back, "Anyway, I am also the one who has won the IPhO gold medal, can the goal be set a little bigger?" ”

"Oh, yes! I'm going to do something in physics, like combining quantum mechanics and general relativity into one to get a unified theory. ”

"Do you study superstring theory?" Cai Guoping asked.

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

"Hahaha, this goal, good, very good!" Cai Guoping slapped Wu Bin twice hard, "As long as you solve it, the dynamite award will definitely be yours, oops!" If you can win the dynamite prize, I'll tell you, I'll listen to the tweeter and go out in the car to publicize. ”

"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?"

Mrs. Cai, who was cleaning up the table on the side, asked.

"Needless to say, of course it's to advertise that this kid is my student." What Cai Guoping said is called a righteous one.

"You~ old and not ashamed." Mrs. Cai smiled and poked him with her finger.

"It's true." After Cai Guoping finished speaking, he continued to turn his head to look at Wu Bin, "But there are far targets, and there are no less near ones, didn't you just say that you are also interested in materials science?" ”

"Hmm." Wu Bin nodded.

"Then I'll give you a direction to develop and study the "heart" of the machine. ”

"Heart...... Dirty? Engine? ”

"Yes, it's an aero engine, heck, my country has tried its best for more than half a century, but it has not yet built a mature and reliable core aircraft."

"Not to brag, aviation marks a country's most sophisticated, the most powerful, the most intensive field of science and technology, which can be called the crown of modern industry, and the jewel in this crown is the engine."

Hearing the three words of engine, Wu Bin couldn't help but think of Zhao Kehan, this guy went to Jinghua to learn this, I don't know if he set his goal to this height.

At this time, Cai Guoping suddenly slapped the table, and his emotions were a little impassioned, "Why is China'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 because it is constrained by the engine. ”

"Fourth-generation military low-bypass ratio high-thrust turbofan engine, fifth-generation military non-geometric structure transformation variable-cycle turbofan engine, high-power turboshaft, turboprop engine ......"

Listening to Mr. Cai report the names of one engine after another like a few treasures, Wu Bin was a little surprised, it was the first time he knew that this teacher still knew so much about aerospace.

"And the F119 engine with a thrust of 156 kN! Why can the F-22 make so many unbelievable body movements in the air? It's just two of these things!! makes it the only fighter that can achieve supersonic cruise without afterburner, which is amazing to think about. ”

"It's amazing." Wu Bin nodded.

"So I thought, since you want to learn more in your freshman year, set a small goal and learn about all the engine disciplines."

After listening, Wu Bin's eyes couldn't help but burst into a burst of fine light, and he nodded vigorously and asked, "At least you have to learn aerodynamics, fluid mechanics, and mechanical design, right?" ”

"I'm relieved to see you come here to react." Cai Guoping laughed twice, "What's more, you first think that aero engines need to work under the harsh conditions of high temperature, high pressure, high speed and high load, and also have to meet the very harsh and contradictory requirements of high power, light weight, high reliability, good safety, long life, low fuel consumption, low noise and less pollution." ”

Saying that, Cai Guoping began to break his fingers at Wu Bin, "Look, high temperature, you have to learn aerothermodynamics, right?" High pressure, high speed, structural mechanics, you have to learn it, right? How do you make these conflicting demands come together? Mechanical design, machining, metal materials, refrigeration, precision machining, smelting and casting, you have to learn, right? And just knowing a little bit of fur, it's useless, you have to learn well. ”

"Uh-huh." At this time, Wu Bin only had one strength left, nodding.

PS: There's a chapter to add later. In addition, the old brother who uploaded the character map to Pei Jiamin in the character area, show! It's pretty good.

In addition, if you have any other suitable character maps, you can also pass them up to take a look, thank you for cheering.