A professor's rebirth: I entered Tsinghua University in 1977.

Old man, you are so awesome, how did you survive to this day?

This is what Liu Hongyi most wants to say to Tan Dexi.

Why do you say that?

Because the day after Tan Dexi arrived at the institute, he offended everyone.

For such a large scientific research project, even for the preliminary theoretical work, Duan Weimin could not rely entirely on Tan Dexi, a frail "old man" and a sixteen-year-old high school sophomore.

So the next morning, Lao Duan sent a few assistants to Tan Dexi.

They all have a solid foundation in mathematics, physics and chemistry in the current research institute, and also have some experience in weapons design.

Over the years, a large number of experienced senior researchers and engineers from the research institute have been scattered all over the country and cannot be recalled in the short term.

Fortunately, Old Duan is a capable man who works hard to maintain the situation of the research institute and barely keeps it operating at the minimum level.

But the assistants sent to Tan Dexi are truly the best among the short ones.

Duan Weimin rubbed his hands together and said a little embarrassedly, "Well, old classmate, I'm really sorry. There aren't many people left in our research institute now. It's just an empty shell... These few are new comrades assigned here in recent years. I have no choice but to lead them myself. Please bear with me..."

Before he could finish his words, he was interrupted by Tan Dexi.

"Did you bring it yourself?"

There was a flicker of suspicion behind the old man's eyes, which showed that he had no confidence in Duan Weimin's ability.

Old Duan was very embarrassed.

His grades were pretty good in school, but for so many years, he'd been involved in administration and hadn't put much effort into academics. If the research institute wasn't facing a generational shortage, he, a deputy army-level director, wouldn't have personally mentored newcomers.

As a result, he is now directly despised by Tan Dexi.

Fortunately, Tan Dexi still gave him some face and did not say anything more unpleasant.

"I don't care whose students you are. Since you are here, you must follow my rules. I will set the questions and you will take the exams. Based on your test scores, I will decide on the tasks you will be assigned."

The old man then said to the four new assistants with a stern face.

The new assistants were a little nervous.

Before coming, Director Duan had repeatedly told them that Chief Engineer Tan had a bad temper and was meticulous in his academic research, so everyone must be humble and cautious in front of Chief Engineer Tan and must not be arrogant.

Now that we meet, it is indeed true.

The old man not only has a bad temper, he is simply "weird"!

Even Director Duan, who has a very high prestige in the institute, was very nervous in front of him.

"Liu Hongyi, bring the blackboard over here and give them paper and pens!"

The old man immediately gave the order.

"Okay, teacher."

Liu Hongyi hurriedly prepared everything according to the old man's instructions.

Without a word, the old man wrote an equation on the blackboard, then raised his wrist to check his watch and said with a stern face, "Start. I'll give you fifteen minutes!"

Looking at the extremely complicated equation, Director Duan began to break out in a cold sweat, not to mention others.

Even if he were to come and solve it himself, it would still be a lot of effort.

Fifteen minutes is definitely not enough anyway.

Several assistants did not dare to delay and immediately began to solve the problem.

But in fact, only one person actually started writing. The other three just picked up a pen and paper and pretended to write down the equation on the draft paper, wrote the word "solution", and then there was no further work.

Everyone frowned and thought hard.

The man who had already started writing was probably in his twenties or early thirties, with an unshaven beard. Although he was wearing a new military uniform, it was obvious that it had not been washed in some time. It was obvious that he was also a slovenly person in his daily life.

Liu Hongyi remembered that when Duan Weimin introduced him just now, he said his name was Zhang Chenghai.

Zhang Chenghai solved the problem very quickly at the beginning, but he slowed down halfway through writing, and it was obvious that he had difficulties with the reasoning steps.

Tan Dexi ignored them and started translating the materials on his own.

The foreign language materials given to him by the research institute were a bit messy.

There are not only English materials, but also French, German and Russian materials.

Most of them are copied from professional journals published abroad.

This is also a popular way for countries to collect the latest scientific and technological information. At this stage, my country's external environment is extremely bad. Almost all countries with relatively advanced science and technology have implemented a technological blockade against my country, and there are very few ways to obtain the latest technology.

Papers that can be published publicly in foreign professional journals must have undergone strict review. The latest military technology will naturally not be published publicly.

Even so, such information is still extremely valuable to many domestic scientific research institutions.

When China first started researching nuclear submarines, all the information it had was a few photos of a nuclear submarine from a certain major power, and a nuclear submarine model brought back from abroad and purchased at a toy store.

Even though it was just a toy model, the domestic research team treated it as a treasure after getting it. From the chief designer to the ordinary researchers, they all held it in their hands and studied it repeatedly, and couldn't let it go.

For Russian materials, Duan Weimin can find a translator.

Liu Hongyi can now help translate the English materials, but Tan Dexi can't find any help for French and German, so he has to do it himself.

In fact, Liu Hongyi can also help.

It's just that he hasn't thought of an "excuse" yet.

It's outrageous that Chuzhou No. 1 Middle School has an English teacher who can teach him professional English.

If you dare to tell Old Tan that the English teacher can also teach French and German, and that the professional level of the sixteen-year-old students he teaches is higher than that of Tan Dexi, do you believe that Old Tan will immediately ask Duan Weimin to go to Chuzhou No. 1 Middle School to second the English teacher?

By then, Liu Hongyi will have to reveal his true colors.

Tell me, what is your purpose in coming to Earth?

Tan Dexi was multitasking, translating documents while keeping track of the time. As soon as fifteen minutes were up, he immediately stopped.

As a result, only half of the answer sheet was returned.

Zhang Chenghai answered half of it.

The other three didn't even write.

Tan Dexi glanced at Duan Weimin, and Director Duan was so embarrassed that cold sweat broke out on his forehead.

"Liu Hongyi, please solve this problem for them."

Tan Dexi said with a cold face.

"Okay, teacher."

Liu Hongyi didn't say a word, just walked straight to the blackboard, picked up the chalk and answered the questions.

After a moment, it was done.

Then he put down the chalk, stood obediently by the side, and waited for Tan Dexi's instructions.

At this moment, it would be inappropriate for him to say even one more word.

"See? Five minutes!"

Tan Dexi snorted and said.