Two days later, the Litang Research Institute.

Yang Yuan's door was opened from the outside again, and Lu Zhengguo walked in with a tired face.

"Academician Lu, why are you here?"

Yang Yuan has already understood that he is a busy man in the past two days, and it is already a very rare thing to be able to take the time to come and see him.

"You arranged for me to come, why can't I come?"

Lu Zhengguo's tired face showed a hint of joy, and it seemed that the progress of the scientific research project was relatively smooth.

Yang Yuan hurriedly asked him to sit down: "I'll pour you a cup of tea." ”

Lu Zhengguo waved his hand: "No, it's rare to have free today, you go out for a walk with me." ”

With that, he walked out the door.

Yang Yuan stopped, pointed to himself and asked suspiciously, "I...... Can I get out? ”

He's been locked up for the past two days.

There are many secrets in the scientific research institute, and it is obvious that they cannot be touched by him.

Lu Zhengguo looked back and smiled: "The flying plan is over now, what's wrong with going out for a walk?" Besides, aren't you locked up here by me? I'm going to take you out for a walk now, isn't it a matter of course! ”

Yang Yuan suddenly showed joy: "Okay!" Academician Lu is domineering! ”

He hurriedly followed, and the two of them walked together to an alloy door in the research institute.

Yang Yuan glanced left and right, the staff around him were still busy, but Lu Zhengguo seemed much calmer.

It can be seen that this scientific research institute also has restrictions on him, as he said before, he has not called and returned to his hometown for a long time.

And now, with the completion of the "Flying Project" nearing completion, this restriction is clearly relaxing.

The two of them went out and walked out along a narrow path illuminated by incandescent lamps, which turned out to lead to the outside of the research institute.

Yang Yuan stood under the blue sky and white clouds in surprise.

After three days, he finally came to the outside world again, and not far in front of him was the location of the last time Lu Zhengguo worshiped the snow mountain.

"We ...... Can it come out? ”

He asked again, confused.

Lu Zhengguo laughed and said: "It turned out that I couldn't, but recently this week, the Chinese Academy of Sciences has relaxed its requirements for me." I can go out for half an hour every day, which is compensation for my thirteen years of imprisonment. ”

There was an indescribable joy in his words, in his demeanor, and in his posture.

There was also a glimmer of anticipation in that joy.

The "Flying Project" is finally coming to an end, so he can leave this ghost place then, right?

When the time comes, he can go home......

Yang Yuan also sighed: "Thirteen years is indeed long enough." There are a few thirteen years in my life. ”

Lu Zhengguo patted him on the shoulder: "When I entered the scientific research institute, I was a little older than you are now, but now I am old." ”

"You are still young and there are infinite possibilities, so take advantage of the time and opportunity to do more things you like and chase the girls you like!"

"Don't wait until I'm my age to feel regretful when I look back!"

He was talking again without knowing what he was saying.

Yang Yuan rolled his eyes: "Academician Lu, even if thirteen years have passed, you are only in your 30s now, right?" It's youth, where is the old. ”

Lu Zhengguo looked at the snow-capped mountains in the distance.

"I joined the Flying Program at the age of 25, and now I am 38 years old, but I already have gray temples."

He said with some amazement.

Yang Yuan stood behind and glanced at the sides of his bun.

It is indeed gray there, and some people are like this, even before they get old, their temples are already gray.

"Academician Lu, I suddenly began to look forward to the results of the Feitian Plan."

Yang Yuan smiled, "By the way, the last moon landing hasn't been finished yet?" ”

Lu Zhengguo also laughed, walked forward to the most suitable position to watch the snow-capped mountains, and sat on the grass.

He patted his side: "Sit together." ”

Yang Yuan sat beside him according to his words, and here he could see the snow-capped mountains standing quietly between heaven and earth like a virgin.

"I'll tell you a story."

Lu Zhengguo suddenly said in a tone of reminiscence.

He pointed to Yang Yuan's pocket: "Did you bring out the mobile phone?" There's a signal here, but you can't send any messages. Your phone has been monitored. However, you can shoot. Don't you like to shoot? ”

What he meant was for Yang Yuan to record his story.

"Then wait a minute, I'll turn on the camera."

Yang Yuan hurriedly took out his mobile phone and saw that the signal bar was indeed gridded.

However, he didn't call or send a message, he just turned on the camera and clicked to shoot.

Lu Zhengguo pointed to the distance again: "It's good to face the snow mountain." ”

Yang Yuan nodded and began to listen.

"Thirteen years ago, I was as young as you, 25 years old, to be exact, a little older than you."

Lu Zhengguo said slowly.

"At that time, I was studying for a PhD at Huaguo University of Science and Technology, focusing on aviation kinetic energy. I also have a very beautiful girlfriend. ”

At this point, he paused.

"Her name is Xu Qianran."

Yang Yuan glanced sideways at him and found that there was a light in his eyes when he said the name.

This is one of the people he cares about in particular.

I don't know why, Yang Yuan suddenly remembered the phone number that I pressed and dialed out last time but stopped, could it be Xu Qianran's number?

"I'm not afraid to say a joke, at that time, everyone in the school called me a genius, saying that I could become a big scientist in the future."

Lu Zhengguo suddenly laughed, "I just laughed at the time, and I didn't take it seriously." Although I have made good achievements in my studies and scientific research, there are so many people doing scientific research in China, why can I become a great scientist? ”

Yang Yuan also smiled, just like they were working on the Daystar project right now.

No one can guarantee success.

Scientific research is based on a certain theoretical basis, according to a certain conjecture, to embark on the adventure of the journey.

"But one day, I suddenly had a breakthrough in aero engines."

Lu Zhengguo's expression changed, "It is no exaggeration to say that just like Cao Yuan in 2017 suddenly discovered the conductivity of graphene, I was also in the process of doing research at that time, and accidentally found that it could increase the efficiency of aero engines by ten times." ”

"And it can be especially used in rocket engines, when combined with a new type of propellant, it can obtain extremely terrifying thrust."

He got to the point at once, and turned his head to look at Yang Yuan.

"This is the core of the 'Flying Project', a new type of rocket engine."

"It'...... It will help China land on Mars! ”

Yang Yuan was stunned.

The landing on Mars he is talking about is probably not a simple landing.

Lu Zhengguo smiled: "You know what? Now the world's great powers are preparing to land on the moon and Mars, and the Artemis program mentioned to you last time is one of them. ”

"And what we want to do is to land on Mars, not to land a probe on Mars, but to the astronauts really set foot on Martian soil!"

Yang Yuan was a little shocked.

Sure enough, this is the real landing!

Lu Zhengguo looked at the snow-capped mountains in the distance and continued: "This is a big problem. Mars is 200 million kilometers away from Earth, and even more than 50 million kilometers at its most recent point. ”

"No rocket has yet been able to reach Mars with enough supplies and astronauts at such a distance. And the flying engine and the new propellant that I invented can do just that. ”

"And the cost will be about ten times lower."

"That's why I've been in this research institute for thirteen years!"

"Huaguo's dream of flying cannot lag behind any country!"