In the sixties and seventies, the international situation was extremely tense, and in addition to having atomic bombs and other weapons of mass destruction to deter the enemy, China's own equipment development was not good, especially the entire system was copied from the former Soviet Union, and the technological development was very slow.

Most of these projects are located deep in the mountains and deep underground.

Just like the Nine Courtyards, Lian Yunfei thinks that people who know the secrets of Daba Mountain don't know.

Now that there is a huge secret research center at the foot of the 132 factory in Rongcheng, or the 810 research institute that studies the most urgently needed engine in the whole of China, he is not shocked at all. Perhaps, this was once an integral part of China's underground nuclear Great Wall.

China's underground nuclear Great Wall has always had a faint legend, but no one knows the specific location and specific situation, even the legend, only faintly pointed out that this project is very huge, where this project is, who is involved, who is responsible, how huge the scale is, no one knows. The only thing that is known, that is, that China's nuclear forces are hidden deep underground.

This involves state secrets, and Yun Fei naturally wouldn't ask about these because of the curiosity that can kill the cat.

Huang Qiaosong also saved the trouble of explaining to Yun Fei.

"Lao Huang, can this thing really fit on my plane and make my plane fly? It can't be a joke, right? Yun Fei is still very unsure about this matter.

China is very backward in the research of aero engines, not that Yun Fei does not believe it, but he has always been measuring the world by the world in which he was originally located, not to mention, the development trajectory of most things in this world is not much different.

From the beginning, he pinned his hopes on Ukraine, which has been suppressed by Europe, the United States and Lao Maozi, after all, their aircraft technology and engine technology are recognized by the whole world, and the whole world has opened a special aviation university in their country. It's just airplanes, not all aerospace.

However, because of international repression, this country with strong technology has not made much manufacturing in this area because it has no capital investment. The gross domestic product of the entire aviation industry ranks only 90th in the world......

Yun's Holdings has so much money, especially now, the old man's intention of not letting Yun Fei take out a loan is very clear, that is, let him invest his money in domestic projects, not in Ukraine, if the research of the 810 Institute cannot meet his requirements, this thing will not be so easy to do.

At that time, the entire large aircraft project may fall into a stall stage because there are no engines.

"Just put a hundred and twenty hearts. There is no diamond. Who would dare to take this porcelain job? The corners of Huang Qiaosong's mouth twitched, and he said helplessly to Yun Fei.

If he hadn't always known about the progress of the 810 Research Institute, he wouldn't have dared to give Yun Fei a ticket like this, wouldn't he? After all, no one is 100% sure of the engine, and what China lacks most is the high-precision and cutting-edge technology that tests the entire country's industrial system and scientific and technological system.

Once the engine for a civil airliner is out, there is no problem with military engines that require more power and work in harsher environments.

"It's not that I don't believe it, it's that I haven't even seen things, how do you tell me to believe it? The ARJ-21 is now short of engines, and all parts of the aircraft are immediately ready to place orders with major domestic machinery factories and material factories. If there is no supporting engine and propulsion system, I will not be able to fly at that time, and the Americans and the British will open their mouths again because of this matter, don't I have to be dumbfounded? I'm betting all my net worth on this......" Yun Fei sighed.

Huang Qiaosong also sighed: "Don't say anything else." There is really no problem with this, this project has always been a concentration of our country's top designers and technicians, and within a year, it can be completely successful. The premise is that you have to provide the aircraft for the test......"

"That's fine. I'll let Ma Fengshan and Cheng come here from time to time, and then you can communicate again, if not. Don't be reckless, the country can afford these losses, and I absolutely can't afford them now. If I lose it, I will only be able to sell all my property and beg on the street, and maybe I will be able to feed my huge family......" These words were not only said to Huang Qiaosong, but also to Hou Mingrui, the director of the 810 Research Institute.

This research institute has always been the shadow of Factory 132 and Institute 611, and the funds used for the project come from the various research projects of Factory 132 and the research funds of Institute 611, and the personnel are directly attached to these two factories.

Even the people in their labor department are not very aware of this matter, and Hou Mingrui is not only the director of the 810 Research Institute, but also the deputy chief designer of the 132 factory, mainly responsible for the design and research of the propulsion system of fighter jets, and also holds an important position in the 611 Institute, responsible for aircraft engine research......

"Plant 132 has an aero engine? Boss, you're not mistaken, are you? Regarding Yun Fei's statement, not only Ma Fengshan didn't believe it, but Cheng also didn't believe it from time to time.

Yun Fei nodded seriously, and at the same time, lowered his voice and said to the two, "Do you know about the 810 Research Institute?" It is said that the research team of this project not only took over the technology from Qin Fei to the bass engine, but also took over the turbofan eight technology of that year, and it has been engaged in it for almost 20 years, and it should be successful if it is not successful......

As soon as he heard Yun Fei say about the 810 Research Institute, Ma Fengshan immediately looked at Cheng Bu beside him with a puzzled face.

Cheng suddenly had a sudden expression on his face from time to time: "I said it earlier, I have always heard someone say that the 810 Research Institute is the 810 Research Institute, but no one knows what this Research Institute is for, and no one knows where this Research Institute is......

"How do you know this, Lao Cheng?" Ma Fengshan was immediately puzzled.

Although he has not been in charge of aircraft design and research since 80 years, and has been engaged in theory and sick leave, he still knows very well the situation of China's entire aviation industry system.

China's 810 Research Institute has never heard of it at all.

"In the 80s, didn't many people shout that the turbofan eight and large aircraft projects we engaged in were backward and could not obtain the technical equipment recognized by the market? At that time, there were many technicians who studied turbofan 8 who either died of illness or went abroad, but no one knows where they ended up. The Northeast is the heavy industry base of the whole country, especially some difficult precision manufacturing business, many times it is manufactured and processed over there, and I didn't go to the Northeast after I got off our Yunshi project, and at that time I saw that the code names of these drawings were all 810 starts, and no one knew this when I asked others, once when I was drinking with Lao Wan, this guy undoubtedly said the 810 Research Institute......" Cheng showed a look of memory from time to time.

Ha Fei's secretary Wan Zhiyong came from a technical background, but the technology is not very good.

"Lao Wan knows about this project?" Ma Fengshan was immediately surprised.

Cheng shook his head from time to time, and said with a wry smile: "If he knew, I would not have said that I faintly heard someone say that this institute was ......"

"Okay, don't discuss this, anyway, the institute is there, and if you can't run away, let's go and see. However, we can now score a clear position, this special charter flight will take you from Shanghai to Chengdu, but it is just to assess whether their Yanhuang 1 engine is in line with our ARJ-21 use ...... "Yun Fei doesn't want to delve into the source of this 810 research institute.

Anyway, he understood that in China, there are always countless secrets hidden.

Less than that, no matter how rich you are, no matter how much status you have, no matter how much status you have, it is impossible to know.

And the government is very tight about the secrecy of some super projects. Just like in Yun Fei's original world, when they hadn't graduated yet, the Northeast Air Force recruited from their school, and the salary was very attractive, but the nature of the work was not said, the type of work was not said, and the length of rest was not said.

The only one that has set out some conditions: the contract is signed for a minimum of 10 years, and a total of three family visits within 10 years add up to a total of half a year, and the unit is responsible for solving personal problems......

At that time, Yun Fei and their school only went to three people, and something happened in the third month, there was a buddy who couldn't stand the kind of life without the Internet, and there were armed guards guarding the phone calls, and he only had to write letters or something, and he had to be censored countless times......

In the end, that buddy heard that he was sentenced to life and service, and it was also the unit where he signed the contract......

Since then, Yun Fei has been insensitive to some secret units......

"Is it suitable for our aircraft project, and this can't just listen to the parameters they report to us, right?" Cheng stared at Yun Fei suspiciously from time to time.

In this regard, Yun Fei is not a professional.

Moreover, some national research project teams often like to use exaggerated rhetorical devices in order to obtain research funding. In these areas, just a little bit worse, the consequences are even more severe.

"Of course, let's go and see the tests of those engines, and if it's really as they say, we'll spend money to produce an extra prototype, and if not, we'll go to Ukraine first and get it done before we start. Anyway, this thing needs a prototype to do a static pressure test, and it takes a lot of time to do a wind tunnel test to test the structural design, and we can't let the whole project cost more money in order to save money......" (to be continued......