1959: Carrying the achievement system, she rolled

Very good, his efforts were not wasted. This method of relieving tension is the result of his experience.

When he met the senior leader, he was so nervous that he almost stopped breathing. If someone had given him some support, he wouldn't have been so useless.

"Come in! The phone will ring in ten minutes, and I'll be at the door." Director Song gave instructions. After Du Yimeng went in, he closed the office door and turned around to stand not far away.

After the tension passed, Du Yimeng had the leisure to look around the director's office.

There was only a phone, a piece of white paper and a pen on the desk.

Finally, her eyes fell on the phone. This phone was exactly the same as the previous one, both in model and color.

But she clearly felt that this phone was a little new.

She walked to the desk and sat down. The chair was quite comfortable.

Director Song, who was waiting outside, was worried that Du Yimeng would get nervous again, so he quietly stuck half of his head out and looked inside through the window.

Then he fell silent...

He worried for nothing...

As Director Song retracted his head, Du Yimeng's gaze fell on a corner of the window. What a bright forehead!

She looked at the watch on her wrist. Time passed by little by little. It was ten minutes before Director Song said. The second hand had just jumped twice when the phone rang.

"Hello..." Du Yimeng said in a clear voice. She held a pen in her right hand and her eyes fell on the paper in front of her.

"I didn't expect it was a young girl. Hello, little comrade, just call me Uncle Seven." The hearty laughter of a middle-aged man came from the other end of the phone.

"Hello Uncle Seventh, I'm Da Meng!" Du Yimeng called Uncle Seventh obediently and introduced himself at the same time.

The other party did not give his name, and Director Song deliberately changed the phone line to a dedicated line to prevent it from being monitored by enemy spies.

In this era, leaking secrets is equivalent to treason, which will bring eternal infamy, so no one dares to take it lightly.

So, the following words had to be understood in a roundabout way. As expected, the following words were completely incomprehensible to those who were not experts.

"The local specialties from my hometown taste great, but not everyone likes them," said Uncle Qi.

"I understand, thank you Uncle Qi for the reminder!" Du Yimeng replied. Uncle Qi probably meant that their rocket engines could not be used on rocket launchers.

"If you don't understand it, how can you know whether you like it or not? Let me tell you about the propellant first. There is too much water in it, so it will spoil easily. It has to be stored in boxes with oxidizers and fuel. When they are ready to eat, someone will send them to your office. It's cold now, so remember to light the stove." Uncle Seventh said naggingly.

He didn't care whether Du Yimeng on the other end could understand him or not. He ended the topic five minutes later.

"Study hard, and when you become successful in the future, come and see Uncle Seventh." Uncle Seventh said with a smile.

"Don't worry, Uncle Qi, I will work hard and try to go back to see you as soon as possible." Du Yimeng heard the word "good" from the other end, and then the phone was hung up.

Her eyes fell on the paper in front of her. There were densely written words on it. It seemed messy, but only she knew what they meant.

She immediately put the cap on the pen, folded the paper, put it in her pocket, and then put it back into the space.

She took out a white handkerchief and wiped it vigorously on the table. After making sure there was no ink mark on the table, she put the handkerchief back into her pocket.

When she walked out of the office, she saw Director Song standing not far away.

She was about to speak when Director Song waved at her and turned away.

She hurried back to the laboratory, locked herself in the office, and then took out the paper with her messy writing on it.

If she guessed correctly, the propellant that Uncle Qi mentioned was the fuel for the rocket engine.

Too much water means it is in a liquid state.

It breaks easily, which means it is highly active but has low stability. What thing has this property?

Thinking about the boxes that would be used to store oxidizers and fuel, she picked up her pen and wrote the word "chemistry".

When it is edible, that is when it is needed, and someone should be the delivery system.

She needs to use a stove in her studio?

She immediately reacted and wrote that they were delivered to the engine's combustion chamber by a delivery system.

Du Yimeng locked herself in the office and did not even come out to eat lunch. No one outside disturbed her.

She didn't put down her pen until it was almost dark, turned on the light, and continued working.

She had no time to pay attention to the protesting sounds from her stomach, her eyes were always fixed on the papers on the desk.

The fuel engine they had previously speculated was feasible, but liquid fuel could not be used.

Chemicals with high activity and low stability must be stored at low temperatures.

You have to know that the new rocket launcher they developed was for guerrilla warfare, and it was common for soldiers to carry it over mountains and across ridges.

Maybe he will expose himself. Is he killing his own people or the enemy?

If liquid doesn't work, then use solid propellant. In this way, there is no need for a tank and a delivery system, and the propellant can be stored directly in the combustion chamber of the engine.

?If the complex fuel pump system and oxidizer delivery system are removed, the engine structure will be relatively simple.

Not only does it save a lot of research time, but the engine size has become smaller, and the most important thing is the cost issue.

Only low-cost rocket launchers can be equipped to all troops.

Only after she had sorted out her thoughts and had a direction for her research did she feel willing to put down her pen.

Only then did she feel her whole body stiff and her neck sore.

She stretched comfortably and turned to look out the window. It was already dark. She checked the time. It was already past nine in the evening.

It seemed like she only had breakfast today. Why wasn't she hungry after so much time?

Stomach: It was hungry and it protested, but its owner ignored it, so it decided to ignore its owner as well.

Du Yimeng used the drawer as a cover and put all the draft papers into the space, then left the office with peace of mind.

When her hand rested on the doorknob, she froze. The door was locked, so who had turned on the light in her office?

Could it be her?

Why doesn't she have any impression?

Just as she was about to open the door, she paused again. She was absolutely sure that there was absolutely no sound outside.

If she hadn't heard Yu Lang's voice, she really wouldn't have dared to go out.

As soon as Du Yimeng came out, she looked at everyone. She was not surprised that Yu Lang was waiting outside her office.

But it was a bit surprising that Qin Chulong and Wan Ping were here. Especially Director Song, didn't he have to go to bed early tonight?

"What are you doing?" Du Yimeng asked curiously. They weren't waiting for her, were they?

"We are admiring the moon. The moon is so beautiful tonight!" Wan Ping said subconsciously.

However, he reacted quickly and immediately looked up at the sky. Great, the moon is full on the 16th day of the first lunar month. The ancients were right. Today is the 16th day of the first lunar month.