Siheyuan starts from a good life

"By the way Ruirui, is that senior Zheng Yang still looking for you?"

"No, the last time he came to see me, he was warned by Teacher Cao and never came again."

"I'm telling you! I thought it was Jiang Yan who took action! Teacher Cao was behind the relationship. Does your Jiang Yan know about this?"

Sun Xinyi continued to ask.

"I know, I told him."

"Then he didn't react at all." Sun Xinyi became even more curious after hearing Jiang Sirui's words, and asked again.

"Why didn't you take action? Didn't Teacher Cao go and warn him?"

"Yes! Teacher Cao is your classmate of Jiang Yan."

"But to be honest, everyone in our dormitory hates Zheng Yang. He is too pretentious and cannot be compared to your Jiang Yan."

"That's how good our Jiang Yan is." Jiang Sirui said this with great pride.

Jiang Sirui is proud of himself for a reason. Some people have been around for many years and still haven't reached the level that Jiang Yan is now. But it's precisely because of this that Jiang Sirui and the others have a high standard for finding boyfriends in their dormitory.

"Classmate Jiang, I have your letter." At the door of the dormitory, Jiang Sirui was stopped by the dormitory aunt and handed her a letter.

"Who will write to me?" Jiang Sirui felt confused after receiving the letter.

But the next moment she did think of Jiang Yan who was on a business trip.

Thinking of this, she quickly looked at the envelope.

"Do you still have acquaintances in Bingcheng?" When Jiang Sirui was looking at the envelope, Sun Xinyi and Zhang Tingting who were following her also saw it, and Zhang Tingting asked.

"No," Jiang Sirui said casually as he looked at the envelope.

"Ruirui, do you think it was Jiang Yan who wrote you a letter?" Sun Xinyi next to her said.

"Hey! Guess what, just open it and see."

Zhang Tingting said and wanted to take the letter from Jiang Sirui.

However, Jiang Sirui avoided him and quickly walked towards the dormitory with the envelope in hand.

Seeing Jiang Sirui leaving, Sun Xinyi and Zhang Tingting looked at each other and hurried over. They also wanted to know who wrote the letter to Jiang Sirui.

Early the next morning, Guo Jianjun came to ask Jiang Yan and the others to have dinner together. After breakfast, the three of them came to the R&D workshop.

Jiang Yan was busy in his office, and Guo Jianjun took Xu Damao to get familiar with his working place.

Last night, after Xu Damao left, Jiang Yan came to his own space.

He asked Guo Jianjun to obtain a complete set of AK-47 drawings and SKS semi-automatic rifle drawings.

Currently, the 47 Factory produces Type firearms, which are imitations of SL's AK- and SKS semi-automatic rifles. The factory has these drawings.

However, if you want to study this drawing, you must personally authorize it from the factory director. This thing is confidential in the factory.

If Jiang Yan hadn't qualified for confidentiality, Director Zhao wouldn't have given him the drawings so easily.

And asked Jiang Yan to protect this drawing.

While Jiang Yan was studying these two drawings in the space, he also sorted out some of the drawings of the Type 81 firearms that he found online.

Combining these three drawings, Jiang Yan started researching. It is said that when he was studying the Type 81 rifle, its shooting accuracy was based on part of the SKS semi-automatic rifle.

According to the information Jiang Yan received, this Type 81 7.62mm automatic rifle adopts the gas-operated automatic principle, and the locking mechanism is a rotary bolt. The firing mechanism adopts a hammer-rotating firing machine. It can not only semi-automatic single-shot but also continuous fire, and is equipped with a fixed grenade launcher at the muzzle that has the functions of silencer, flame suppression, retardation and anti-bounce. The bayonet it is equipped with is detachable, and the bayonet can also be used as a dagger after being disassembled. In addition, it can also fire anti-personnel, armor-breaking, incendiary, smoke grenades and 60mm anti-tank grenades with live ammunition. It can also fire 40mm rifle grenades with live ammunition.

Moreover, the Type 81 has an empty magazine hang-up mechanism. The so-called empty magazine hang-up means that when the bullets in the magazine are empty, the bolt automatically stops behind, making it easier for the shooter to replace the magazine and load the gun in time. The light machine gun is equipped with the same hooking mechanism. When shooting with a magazine, it can function as an empty magazine. When shooting with a drum magazine, it has no hooking function. However, the machine gun has strong continuous firepower and the barrel heats up high, so the Type is lightweight. The machine gun can be manually hung up during battle breaks to speed up barrel cooling to make up for the inability to quickly replace the barrel. When shooting, the gun must be pulled back to load the gun and continue shooting.

Jiang Yan must retain their good features. As for his ones, their structures are not advanced enough, there are not many new materials and new processes, they are not required to install optical sights, and even their appearance has no characteristics. Jiang Yan will improve these problems one by one. .

After I came to my office this morning, I started studying again.

"Gong Jiang, look at it. The copper coating on the steel is uneven."

While Jiang Yan was busy researching, the door to his office was pushed open. Jiang Yan looked up and saw Hu Dahai walking in.

Seeing Hu Dahai come in, Jiang Yan quickly covered the drawing he was looking at with a piece of paper.

Jiang Yan brought it over and Hu Dahai brought it over to cover it with copper and just took a look.

He brought over this piece of so-called copper-clad steel. The copper coating on it was extremely uneven. Some were light in color, some were dark in color, and it did not have the unique gloss of copper.

"Tell me the detailed steps of your production."

Jiang Yan took this piece of so-called copper-clad steel and asked Hu Dahai in a deep voice.

Hu Dahai heard Jiang Yan's words and told Jiang Yan his detailed steps for producing copper-clad steel.

The copper pouring steps he mentioned were basically the same as what Jiang Yan told him. So where did this problem arise? Jiang Yan just fell into deep thought as he played with the so-called copper pouring in his hand.

He went through the steps Hu Dahai said over and over again in his mind. After repeating it several times, Jiang Yan felt that there was no problem with this step. If there was a problem, it would also be caused by the chemical agent used to coat the copper.

Thinking of this, Jiang Yan knew the answer in his heart, and said to Hu Dahai: "Bring me the chemicals for copper coating and let me take a look."

Hu Dahai stopped at Jiang Yan's words, turned around and left Jiang Yan's office. After a while, he came over with a bottle.

When Jiang Yan saw the chemical agent, he understood that the problem occurred with this agent.

"This potion is wrong." Jiang Yan said.

"Isn't it right?" Hu Dahai was filled with doubts after hearing Jiang Yan's words.

"Prepare the contents according to this recipe."

After Jiang Yan finished speaking, he wrote out a recipe on his desk.

The formula written by Jiang Yan is the formula of the famous Q/YS.112 electroless copper plating liquid in later generations. Jiang Yan and his previous factories almost all used this chemical formula to produce copper-clad steel plates.

"This is a formula for electroless copper plating liquid. It doesn't require any explanation. It's very convenient to try."

Jiang Yan explained when handing Hu Dahai the formula.

After hearing Jiang Yan's words, Hu Dahai didn't ask any more questions and just walked out of Jiang Yan's office with the formula.