The military-industrial scientific research system of the academic master.

Du Yishan's connections did not disappoint Chang Haonan.

In just one day, the latter received a call back.

"Xiao Chang, I have contacted you about the heavy-duty die forging press you mentioned. It was designed by Tsinghua University, but it was not in the 80s. The project was established in the 70s. It lasted for almost fifteen years, and it was awarded Second Prize for Scientific and Technological Progress, but was later forced to cancel due to some technical obstacles and lack of funds. It should be the same project as what you mentioned?"

"should be."

Chang Haonan suddenly became energetic,

"Did you find out who was responsible for the design of the die forging press at Qinghua?"

Jin Gui's previous knowledge of this matter also came from hearsay. It is normal for some mistakes to occur, but as long as this project exists, it will be of great help to Chang Haonan's plan.

"That's not there."

Du Yishan on the other side of the phone had a slight smile in his tone,

"I directly contacted Academician Shen Hong, who was the deputy director of the National Machinery Commission at that time and later the consultant of the First Ministry of Machinery."

Hearing this name, Chang Haonan almost blurted out something awesome.

Fortunately, I held it in in the end.

Of course, the person who can make Du Yishan address him as "Old Shen" cannot be a mortal.

Shen Hong.

Even though he was not in the same system as Chang Haonan, the latter had heard of this name.

He only attended the fourth grade of elementary school. He served as the chief engineer of the Chafang Arsenal during the Yan'an period and became a legendary academician who was self-taught along the way.

In the 50s, he presided over the design of China's first -ton hydraulic press, and has been engaged in the development, organization and leadership of mechanical engineering for a long time.

Of course, Mr. Shen should be in his 90s now and must have left his front-line position long ago.

However, even if such a powerful person retires, he can still maintain a considerable number of contacts.

What's more, the 6.8-ton die forging press project was initiated during his tenure as deputy director of the Machinery Committee.

"Academician Shen is checking up on his health in the hospital these two days, so don't disturb him. He said that you can come to his home next Monday. At that time, he will also call the people who are responsible for several important sub-projects at that time."

Good guy, this is the influence of senior academicians.

A family photo came directly.

"Okay, your help this time was so timely."

Chang Haonan thanked him, chatted with Du Yishan for a while, and then hung up the phone.

……

Three days later, Chang Haonan specially brought some gifts and went to the address given by Du Yishan.

An ordinary apartment building.

Probably the first batch of new-style buildings built in the capital in the late 80s, they are already a bit old now.

Certainly not a high-end residence.

But it’s not like living in a snail’s nest as some reports like to portray.

It's just plain ordinary.

If it weren't for the rather special location, no one would have thought that many famous academicians lived here.

Ringing the doorbell, the person who opened the door was a young woman who looked about 30 years old.

"you are……"

After seeing such a young person standing at the door, who even looked like a student, she even subconsciously stuck her head out and looked outside.

It turned out that there was no one else behind Chang Haonan.

"Who are you?"

Although this community is unremarkable on the surface, the security is still in place. There is no way for people to come in casually, so she doesn't think anything bad about it.

"I am Chang Haonan. I have contacted Mr. Shen before and I am coming to visit him today."

"Uh...you are..."

The woman was obviously a little surprised by this answer. She did not let Chang Haonan into the house immediately, but turned back and shouted inside:

"Grandpa, there is a guest named Chang Haonan at the door looking for you..."

Obviously, this should be Shen Hong's granddaughter.

Immediately afterwards, a man who looked to be in his fifties walked out of the house. When he saw Chang Haonan at the door, he quickly walked forward:

"This is Comrade Xiao Chang. I've heard Mr. Shen talk about you before. You are Academician Du's top disciple and a close disciple. Please come in..."

Chang Haonan handed the fruit basket, snacks and drinks to the woman who just opened the door.

The other party took it in his hand and expressed his apology slightly awkwardly:

"I'm so sorry... I just heard from my grandpa that the person here is an expert on the 973 project. I thought you were a professor about the same age as my dad..."

"My name is Shen Yiqing. I am Shen Hong's granddaughter. I am not engaged in scientific research, so I may not know much about you..."

Chang Haonan remained calm:

"It doesn't matter, I'm used to it..."

Since his rebirth, Shen Yiqing will not be the first or the last person to be shocked by his age.

After all, it wasn't a big misunderstanding. It was human nature not to let strangers in, so after a few simple explanations, the matter was over.

As for the man who came out of the back room, his name is Yan Yongnian, a professor at Qinghua University.

He was one of the main designers of the 6.8-ton heavy-duty die forging press that year.

Under his leadership, Chang Haonan walked between two tall piles of newspapers and walked into the innermost bedroom.

"Mr. Shen, it's an honor to visit you at your home."

Chang Haonan shook the old academician's almost withered hand.

During his free time in the past two days, Chang Haonan read the information and determined that Mr. Shen was 91 years old. Although his spirit was still good, his body was indeed relatively weak.

Before entering the house just now, Shen Yiqing also asked that the conversation should not last more than an hour.

Therefore, Chang Haonan made a long story short and talked about his plan to re-launch the development of heavy-duty die forging presses based on existing results, as well as the current demand for die forging presses in the domestic manufacturing industry, especially the aviation manufacturing industry.

As a result, Shen Hong's eyes suddenly lit up as his hand on crutches was still a little shaky.

When he mentioned the die forging press, he seemed to be twenty years younger in an instant.

"Actually, the reason why this hydraulic press could not be operated back then was mainly because several places encountered great difficulties or reached a dead end. They failed to make breakthroughs for several years in a row, and the superiors gradually lost confidence..."

After picking up the cup and taking a sip of water, he slowly began to introduce Chang Haonan:

"At that time, we still achieved some results in hydraulics, electrical and control equipment, but in the end we were mainly stuck in three places."

"First, the domestic research on the main body structure is not thorough enough. From experience, the most suitable frame for super-heavy hydraulic presses should be the plate and frame combination. The 4.5-ton model in the United States, the 7.5-ton model in the Soviet Union, and the Soviet Union exported to The 6.5-ton unit in France has this structure, but the structural calculation requirements are very high. We can only settle for the next best thing and use a prestressed steel wire winding structure. Although it can theoretically reach about 6 tons, However, the stress distribution of the steel wire winding layer is uneven and the reliability is very poor. Especially since we cannot make good enough steel wire materials, it is even worse..."

"The second is that the research on equipment vibration is not thorough enough. We discovered this problem during the pilot test, but we have never been able to completely solve it."

"The third is hydraulic oil. We couldn't find hydraulic oil that met the requirements in China at that time..."

"To solve these problems, it will take a lot of time and funding, but by that time I had already stepped down from my position, and the wind direction above was also changing, and finally..."

Although the speech was a bit stumbling, and even had to stop and stop for a while, and a lot of explanations from Professor Yan Yongnian were inserted during the speech, the veteran academician was absolutely familiar with these technical issues.

At the end of the sentence, he even became a little emotional.

Shen Yiqing, who had been paying attention to the situation at the door, quickly came in and comforted him for a while before he calmed down.

After sending his granddaughter away, Shen Hong, who was obviously a little tired, raised his head and looked at Chang Haonan sitting on the chair next to him.

His eyes looked like those of a child who saw a toy he liked but didn't know if he could buy it.

"Now, have you been able to solve all these problems? And... can the higher-ups really approve the 6.8-ton hydraulic press?"

Brothers, please continue to ask for monthly votes!