Xie Qifen led Li Zheng out of the school, found a familiar Sichuan-style snack restaurant, ordered a few plates of spicy dishes, and started chatting while blowing on the wine bottle.

As soon as he drank, he became chattier than usual, and the topics were more exciting.

Just now I was talking about mechanics, and suddenly I started talking about quantum mechanics.

The spraying and spraying extended to Schrödinger's open marriage, how dignified wives and concubines were in groups, the red flag at home did not fall, and the whole city's colorful flags were flying.

Then the topic strangely transitioned to "sexual repression among science students", and he said that when he was an undergraduate, he wanted to write a paper on "the correlation between sexual life and scientific research efficiency."

, was rejected, but he felt that this direction was feasible, so he modified the topic and changed it to "The impact of sexual life on IQ", and then nothing happened.

He still thinks that he cannot do this topic, not because it is unreliable, but just to take care of the self-esteem of the majority of science students.

When the conversation reached this point, Li Zheng couldn't stand it anymore and wanted to return the topic to study, so he asked a question about fluid mechanics.

He didn't hesitate to give some advice, and immediately gave Li Zheng a topic to choose -

[Analysis of fluid mechanics in sexual life]

Seeing Li Zheng's stiff face after hearing the topic selection, Xie Qifen admired it very much.

"Look, this topic covers fluid mechanics, biology, and ergonomics. It's such a big topic." Jie Qifen sipped his beer and laughed, "The key is that this is still virgin territory. You know how difficult it is these days.

Are you looking for it? I mean virgin land for scientific research."

Li Zheng coughed dryly: "There is a person named Director Bi in the bar. He may be interested in this topic."

"No." Jie Qifen raised his hand firmly, "Such a good topic cannot be given to Jinghua."

"Are you serious, teacher...is there any significance in choosing this topic?"

"Yes, the application prospects are very broad." Xie Qifen gestured, "I'll just talk about a few things for you to experience - [automatic erection machine] [suppression ejector] [double expansion ring]... Yes

Do you feel it?"

"These... these needs seem to have been solved by medicine."

"Can it be the same? Don't you think the physical path is more interesting?"

"Okay..." Li Zheng shook his head and sighed, and said with some hesitation, "Of course it's okay to talk about this while eating...but I'm still more concerned about the topics you are really working on. These things sound like..."

"Minke?" Xie Qifen smiled and opened a new bottle of wine, "It's okay, let's be honest, I've been criticized like this for more than ten years."

"No, I want to say Doraemon."

"Haha, it doesn't matter." Jie Qifen took another sip of half a bottle, looked at Li Zheng's serious eyes, and finally sighed unable to refuse, "I have nothing to do now. If someone is willing to give me the funds, I will

Maybe I will really get a double expansion ring..."

"..."

"Okay, I know you find me annoying." Jie Qifen put down the bottle of wine and quickly took two bites of food. "Hurry up and finish your meal. Let's go back and continue teaching you."

"It's not annoying, Teacher Xie." Li Zheng picked up the wine bottle and poured himself a half cup, "It's just that when I am with people like you, I will unconsciously want to absorb nutrients in physics. I want to know

What kind of research did an early champion like you engage in and what kind of content did he think about?"

"Research and think?" Jie Qifen shook his head and took a mouthful of tiger food. "It's still early, Comrade Li. It's not that I don't want to say it, but you shouldn't listen now."

"It's okay..." Li Zheng raised his glass sincerely, "I'm mentally prepared. Even if you really make a perpetual motion machine, I can accept it. To be honest, I trusted your knowledge at first and was very suspicious of you.

Your personality...Now it's the other way around. I trust your personality very much, but I'm starting to doubt your knowledge..."

Jie Qifen was stunned for a moment, but he quickly picked up the wine bottle and bumped it heavily with Li Zheng.

"Thank you for your trust." Jie Qifanji occasionally became serious, stared at Li Zheng and said, "I will try my best to show you my way of thinking and training methods. But my real thinking in physics, sorry, now

Not yet."

"Why?"

"If it doesn't work, it won't work." Jie Qifen put down the bottle of wine, his face no longer beaming with joy, but instead covered with a layer of numbness.

No matter what Li Zheng said, he didn't answer. Even if he asked about doubling the size, he wouldn't answer.

He just took out his mobile phone and walked towards the counter a little crookedly, leaving behind only the back of an ordinary middle-aged drunk man.

On the way back, the two of them didn't say a word.

When I returned to the small classroom, it was already eight o'clock in the evening. In the large experimental classroom next to it, people from the training team were still doing experiments.

Jie Qifen had no interest in this, so he just returned to the blackboard and started scribbling casually.

Although he was a little drunk and not very interested, what he said was still remarkable.

"In the past few hours, you learned a new way to solve a problem."

“Draw physical images, then convert them into mathematical problems, and then calculate and restore the physical results.”

"This is actually not a new method. Physics problems can be solved this way since middle school."

"It's just that now, after mastering differential sums and products, there are no longer any obstacles to the transformation between physics and mathematics."

"But this does not mean that all physical problems can only be transformed using calculus."

"In other words, calculus is the stupidest method."

"You know the pictures on the computer are to divide a picture into millions of pixels, and then describe the color of each pixel to show the entire picture. This is the stupidest method."

"If we are smart, we can record the characteristics of the image to describe it."

"For example, in a picture, one million pixels in the upper left corner are all black. We only need to record the critical point position and black information."

"And this is the Euler description in fluid mechanics."

"Now, let's put down the idea of ​​switching to calculus and let's take a journey of thinking with Lao Ou."

The following class, unlike the initial harsh jump, gradually became gentler and added a lot of guidance and examples that were easy for people to understand, making the whole class soft and comfortable.

Of course, when it comes to mathematics, it is still very steep. There is always a sudden "shimmer", and then I can't even understand it.

I don't know how much time passed, but suddenly there was a knock on the door.

After Xie Qifen agreed, the two boys walked into the classroom and looked at Li Zheng trying to reconcile Qifen with a little sadness in their eyes.

Li Zheng noticed that there were more people gathering at the door of the classroom. Lu Yang was trying to think of a way to get everyone to disperse, but he couldn't do it either.

Jie Qifen rubbed his head, maybe because he was drunk, and asked a little irritably: "What's wrong?"

"Teacher Xie...we also want to hear..."

"You can't just give him a small stove and push us all out..."

As soon as these two sentences were said, the outside became quiet.

"Listen." Xie Qifen pointed to the empty seats in the classroom and said, "I'm not asking you to listen, so you should sit down."

The two were startled for a moment, then became happy and quickly found a seat near the front to sit down.

Many people from outside also came in, and the classroom was full in a short time.

After solving the problem, he shook his head and asked Lu Yang for a bottle of mineral water. After taking two sips, he started talking again.

In an instant, the tenderness was gone, and the content returned to what was originally told to Li Zheng.

Cut it into pieces, then lightly mince it and it will come out completely.

It's a rhythm that even just taking notes can't keep up with.

gradually……

The number of people started to decrease...

"Excuse me, Teacher Xie..."

"You can't even pass these...exams..."

"Why do I feel like I'm listening to "Mathematical Analysis"..."

"It's better to go back to sleep..."

"Li Zheng, can you understand this?"

In more than twenty minutes, everyone who had just squeezed in had squeezed out again.

Only Qi Ying, a man with thick eyebrows and big eyes, sat farthest away from Li Zheng and listened hard.

Jie Qifen looked at his constipated expression and smiled. He threw down the chalk and asked, "To be honest, how much did you understand?"

"Zero!" Qi Yingnan replied enthusiastically.

"Then what are you listening to?"

"The truth of physics!" Qi Yingnan didn't give in at all, and nodded blankly, "You asked from the beginning, who wants to get close to the truth of physics, I think."

"Oh? Are you still asking this?" Li Zheng in the back row said in surprise, "Then I want to, too."

"Ignore you." Qi Yingnan shook his head, as if he held a grudge and did not offend Li Zheng at all.

Jie Qifen looked at his watch, then at the two of them, and couldn't help but shook his head and sighed: "It's already past ten o'clock, look at the virtues of the two of you. Let me talk about it a little bit, just use your imagination.

Don’t think too deeply about it.”

As he spoke, he turned back and pointed to the puddle of water just drawn on the blackboard: "What I have been teaching just now is nothing more than describing physical problems into physical images and transforming them into mathematical problem solving, right?"
To be continued...