The letter was sent from a military compound in Beijing, and the postmark on the envelope can clearly prove this, especially at the sender's place, the two graceful and elegant small letters, while dignified, but also particularly eye-catching, because those two words are nothing else, it is Guo Rui

"She's writing to me out of the blue!"

"I know!"

"Why did she write to me?"

"It's a matter of asking for advice!"

"Do you believe it?"

"Why don't I believe it?"

"What if it's a love letter?"

"Then you can do it!"

When Lu Jiadong received this letter, he told his wife about it without concealment, because his wife's "warning" a few days ago was still in his ears, but more importantly, he had no feelings for the little girl who had only seen two sides at all, so he didn't want to have any extraneous branches, but he didn't expect that after confessing to his wife, Chen Ziyue waved his hand indifferently like a prophet who knew everything:

"She's already been angry with me before, it's completely a technical inquiry, you can reply to her, to be honest, I'm really happy to be able to let a proud person like her bow her head and ask for advice!"

After hearing these words, Lu Jiadong was frozen on the spot as if he was being poured concrete, and at the same time, he became more and more unable to understand what kind of logic the style of doing things between women followed.

But he doesn't know what to do and what he is wrong, but his heart is clear. It is very clear that the reason why Chen Ziyue dares to let him read the letter and reply to the letter is that he has enough confidence. Otherwise, with his wife's little timidity, he would never dare, but now, Chen Ziyue kicked the ball to himself, there must be something strange in this, since there is something weird, it is unusual, since it is unusual. Then you have to be cautious, since you have to be cautious, then you can only quietly look at this letter from afar in a daze!

That's right, Lu Jiadong at this time. He was sitting at his desk, staring at the letter in a daze, for he was not sure what was written in it, what if it was a brave confession, or what if it was vaguely ambiguous? Although he is a man in two lives. For things like confidantes, they are not excluded.

But for Lu Jiadong, who is a very traditional person in his bones, his rejection is to look at others not to reject, and he always feels a little uncomfortable when it falls on himself, if he doesn't know Guo Rui's intentions, it's okay, but Chen Ziyue has already made things clear a few days ago, which can't help but make Lu Jiadong think seriously, so that the letter on the table was picked up and put down by him. Put it down and pick it up again, repeat it a few times. But it was never opened

"Hey~~ What's wrong with you today? Isn't it just a letter, buddy has even seen the scene of a cannonball flying above his head and a bullet in his crotch, and I'm afraid of a letter, and you're a little girl?"

Although he thought so in his heart, his frowning brows still showed the uneasiness in Lu Jiadong's heart, and he couldn't help but take out a cigarette, light it, and take a few puffs.

Then, as if when I was in school in the later world, I peeked at prohibited books such as "Golden Vase Plum", secretly unfolded the letter paper, and quickly glanced at it, and then suddenly breathed a sigh of relief, because the letter was just as Chen Ziyue said, the whole article was full of military technical problems, whether it was disassembled or reorganized, let alone a confession, there was not even a sense of ambiguity.

Looking at such a letter, Lu Jiadong couldn't help but laugh slightly, it seems that he really thinks too much, too complicated, after all, it is the eighties, what is particular about the literary and artistic style of "black gives me black eyes", and the technical style that wants to sleep after a few glances, how can there be so many straightforward and complicated things.

Thinking of this, Lu Jiadong's nerves that had just relaxed couldn't help but tighten suddenly, and his heart said What was wrong with him? Do you want to fall suddenly towards the abyss of looking for a confidant? You must know that it is a bloody episode of some novels, and it is an important drama tailored for the protagonist, he is not a glorious protagonist, even if it is, presumably the scumbag author, he will not be bored to such a point, so Lu Jiadong shook his head suddenly, reopened the letter, and the dignified and delicate hard pen appeared in his eyes:

"Lu Jiadong Tong~~ Zhi, hello, I am Chen Ziyue's classmate, Guo Rui, when I was in school, she often mentioned you, after being admitted to graduate school, under the tutelage of Yang Hongyi, Professor Yang, I talked about you more often, especially in the calculation of the recent wind tunnel values, Professor Yang will mention from time to time that you proposed the 'energy mobility theory', so I want to take the liberty of asking for advice, this theory"

The handwriting is very delicate, there are almost no traces of alteration and error, if the view of the word view of people is true, through the dense and dense text, it can be seen that Guo Rui is a beautiful look, thoughtful, logical and rigorous girl, in a popular phrase in later generations, can be called a school flower-level scholar.

However, even so, Lu Jiadong only stayed for a moment on this handwriting with beautiful traces, and then in the simple and unpretentious content, he gave birth to a little nostalgia for the old Wanshan Factory, especially Lao Yang, who had not seen him for many years, and I don't know how he is doing now? Is he still not so desperate as San Lang at work? How is the aviation dream that he obsessed with in his heart going?

Especially when he saw the words "Energy Mobility Theory" marked with double quotation marks, Lu Jiadong seemed to have returned to the small factory deep in the ravine, in the cold and rainless winter, in the cold but warm small bungalow, he and Lao Yang sat opposite each other, chatting eloquently.

or imagine the future development direction of the military industry, or tell the ultimate goal of weapons and equipment, or argue endlessly because of a certain theory, or look at each other and smile because of the unanimous tacit understanding, that is, in this process, Lu Jiadong talked about the "energy mobility theory",

It's just like a glimpse, not deep, but I didn't expect that Lao Yang would remember it today, which made Lu Jiadong's heart not only feel, but also a kind of touching, so Lu Jiadong took out a blank letter paper, picked up the pen, and soon wrote a letter, stopped writing, the sky was already dark, but Lu Jiadong's thoughts could not be calmed down for a long time

A few days later, also at ten o'clock in the twilight, Guo Rui took the letter she received during the day, locked herself in the bedroom, and read it sweetly over and over again, the scribbled handwriting on the letter paper was not unusual, but it was like an axe and a chisel carving, deeply imprinted in her heart, so that for a while she didn't know what to do, because she didn't expect him to really reply to her:

"He's not very busy, and I heard he doesn't even have time to eat!"

Guo Rui looked at the letter in a daze, just like when Lu Jiadong looked at her letter a few days ago, but compared with Lu Jiadong's state of mind, Guo Rui felt even more flattered, so on her beautiful face that seemed a little stubborn, a few warm smiles were sketched from time to time.

But in the next moment, this smile suddenly turned cold, and disappeared immediately, because she remembered a certain possibility, because of this possibility, he should not be busy now, but because of this, there was a little jealousy and a little sour taste in her heart for no reason, and then she muttered with some regret:

"At the beginning, I didn't have to take the initiative," he said, his long eyelashes fanned a few times, and his blue wave-like gaze focused on the thin letter again:

"The 'Energy Maneuverability Theory', also known as Boyd's Residual Power Theory, is a new set of aeronautical computing theories proposed by Major Boyd of the United States Air Force in the sixties, dealing with the relationship between aircraft reasoning and drag, when the aircraft flies at a certain altitude at a certain speed or pulls out a certain G-value action,

There is a certain amount of resistance. And at this altitude and temperature, the engine also has a potential maximum inference, when the flight attitude remains the same, and the pilot increases the throttle to increase the reasoning, how much extra energy will the aircraft gain when the throttle remains the same and the aircraft pulls out a G-value action at a given altitude and speed, due to the increase in drag, or how much will the speed fall?

Guo Rui didn't fully understand the content of the letter, but he was satisfied to see the person's handwriting, not to mention such a profound question, but he could talk between the lines, you must know that even his teacher, Yang Hongyi, Professor Yang could not say the profound truth, so in contrast, she admired him even more, so she picked up the pen, took out the letter paper prepared earlier, pondered for a moment and began to write neatly, because she didn't want to end here, hoping that there would be more such letters, and more

"Professor Yang wants me to study this theory as a subject, so the original plan to work in Wanshan Factory may be postponed, but he hopes that I will ask you for advice, after all, you are the original introducer of this theory, although the previous letter was very thorough, but I still have a few things I don't understand, first"

Lu Jiadong took the letter that had just been delivered to him, looked at the long question entries on it, and his head was dizzy for no reason, but then he was happy for no reason, because she was worried that she would not come to Wanshan Factory at all, in this case, it doesn't matter if you answer some technical questions, thinking of this, Lu Jiadong felt a little relaxed, and the pen and the book were much faster (to be continued. )