I painted an aircraft carrier on the courtyard house for Dongda University.

Professor Zhang's face darkened upon hearing Zhou Weiguo's words, and he said in a strange tone, "Oh, you seem to know quite a bit about America's current weapons? Come on, let me test you again. What kind of blueprints are these?" As he spoke, he unrolled a roll of blueprints.

Upon seeing this, Zhou Weiguo chuckled, "Teacher Zhang, are you kidding me? This isn't the Goose's AK47, the king of rifles!"

Professor Zhang's eyes flickered slightly: "If you're so capable, why don't you tell me its advantages and disadvantages? Anyway, I'm just killing time."

"This gun has very obvious advantages and disadvantages," Zhou Weiguo laughed. "The advantages are that it's robust, durable, low-cost, adaptable to various environments, and has high firepower. The disadvantages are poor accuracy, high recoil, and it's incredibly heavy."

As soon as he finished speaking, he saw Professor Zhang looking at him with a scrutinizing expression, which made his heart skip a beat: Damn it, I spoke too fast!

Professor Zhang stared at him, his expression serious: "Kid, where did you get all this information? How can an automation student know so much about firearms, even the unpublished parameters of the M3 carbine?"

Zhou Weiguo hurriedly explained, "Professor Zhang, please don't misunderstand. I've seen American guns on the North Korean battlefield, and I learned about AKs at Harbin Institute of Technology. I'm really not an enemy spy!"

"Bullshit!" Professor Zhang retorted. "You were still wearing open-crotch pants when North Korea was fighting! I didn't say anything, but you've already admitted to being an enemy spy. Honestly, did you come here to steal gun blueprints?"

Zhou Weiguo's face turned pale, and he blurted out in a panic, "What are you talking about? What kind of secrets are these? Don't try to trick me!"

Professor Zhang was so angry upon hearing this that he puffed out his beard and glared at him: "What do you know! The AK47 is the most advanced assault rifle in the world. We can't build it even with the entire nation's resources. Our big brother sent engineers to help us for several years, and it's still not finalized! How dare you call it a 'thing'?"

Zhou Weiguo was completely dumbfounded: Wait a minute, wasn't the domestic version of the AK, the Type 56 assault rifle, finalized in 1956? Isn't it 56 now? Why hasn't it been finalized yet? Is it due at the end of the year?

Seeing him in a daze, Professor Zhang felt like he was about to jump up and down in anger.

Zhou Weiguo suddenly snapped back to reality: "Professor Zhang, I wasn't lying! I really did participate in the North Korean War. I was a freshman at Harbin Institute of Technology at the time, and Professor Wu tricked me into going to support the front lines!"

Upon hearing this, Professor Zhang's serious face finally broke into a barely suppressed smile as he said, "You're the student who saved Wu Yuanyang on the battlefield?"

Zhou Weiguo was taken aback: "You know Old Wu?"

Professor Zhang finally smiled: "What do you think? Wu Yuanyang calls me brother-in-law; we were classmates studying abroad."

Zhou Weiguo finally breathed a sigh of relief and said with a wry smile, "Teacher Zhang, are you kidding me? You scared me to death."

"You're actually afraid?" Professor Zhang glared at him. "You just walk into a professor's office like that? Aren't you afraid of being arrested as a spy?"

Zhou Weiguo smiled ingratiatingly, "I was thinking that since it was summer vacation and no one would be around, I got so engrossed in the blueprints that I came..."

"So it's still my fault?" Professor Zhang snorted. "Alright, enough of that. Yuanyang called a month ago to tell me about your situation and asked me to look after you in Beijing. If you hadn't saved him, I wouldn't have come to Tsinghua for this exchange. I'm so tired of running between Tsinghua and Beijing University of Technology. By the way, my name is Zhang Yi, you can just call me Uncle Zhang, don't keep calling me 'teacher.' This is my student, Ying Xiangdong, you can just call him Brother Ying."

Come on, tell me now, what are you thinking? You really look down on these AK47s? Don't tell me Yuanyang didn't tell you about the technical aspects of this gun.

Zhou Weiguo felt a little awkward speaking to Lao Wu's brother-in-law. Ever since he and Lao Wu came down from the battlefield, Lao Wu had treated him like a younger brother, taking care of all his needs without him having to worry about food, clothing, or shelter. Lao Wu even insisted on having him live with him in the professor's apartment.

Even though he insisted on coming to Beijing, Lao Wu, despite pressure from the school, didn't object. Unexpectedly, upon his arrival in Beijing, Lao Wu even asked his brother-in-law to take care of him.

Thinking of this, Zhou Weiguo remembered the 81-bar in his spatial storage, and his eyes lit up. He pulled up the data from the 81-bar, recalling the time he and Lao Wu disassembled the AK47, and compared it, saying, "Uncle Zhang, it's like this, I specifically studied the AK47 when I was at Harbin Institute of Technology. I even test-fired two magazines back then, and its advantages and disadvantages are what I just told you. Later, I thought, since the AK has these shortcomings, why not try to modify it?"

Then I considered whether I could adjust the long-stroke piston design of the AK to a short-stroke piston. This adjustment should effectively reduce recoil and improve long-distance accuracy.

Adjusting the receiver length and extending the recoil spring would effectively improve the overall controllability of the rifle.

Furthermore, making the gas port adjustable will further improve the accuracy of the firearm and also allow it to withstand harsh environments.

I also wanted to adjust that ugly oversized pry bar and iron sights. Although this design might slightly increase the failure rate, wouldn't it be more reasonable in terms of accuracy and handling?

Uncle Zhang and Brother Ying, who were standing to the side, were dumbfounded. They thought to themselves: "I just wanted you to know that you shouldn't look down on a mature and advanced firearm like the AK47, not to have you lecture us! Are you kidding me with all that rambling?"

Zhou Weiguo watched the two of them remain silent and muttered to himself.

After waiting for a while, Uncle Zhang and Brother Ying finally reacted, staring at Zhou Weiguo in shock. Uncle Zhang stammered, "Um, Weiguo, you... you're not joking, are you? Are you teasing me?"

Zhou Weiguo looked blank: "No."

"Then where are your blueprints? Where are the blueprints you designed?"

Zhou Weiguo was taken aback by the question, and after making up a story for a while, he finally said, "The blueprints were too big, and I was too lazy to bring them when I came to Beijing, so I just burned them."

Upon hearing this, Uncle Zhang's eyes widened, and he looked like he wanted to strangle Zhou Weiguo: "You're fucking insane! Even if you can't get it back, you could give it to Ocean Shipping! Regardless of whether the design can be manufactured, at least your idea is advanced and definitely worth verifying!"

Zhou Weiguo quickly said, "Uncle Zhang, you're making a mountain out of a molehill. The blueprints are all in my head. If you give me the machine tools, I won't even need the blueprints; I can just make the gun out by hand."

Uncle Zhang looked at him like he was crazy, clearly not believing him.

Seeing this, Zhou Weiguo got angry: "Hey, Uncle Zhang, don't you believe me! If you don't believe me, you can ask Old Wu, ask about my fitter skills! It's no exaggeration to say that my fitter skills are a gift from God!"

Uncle Zhang then remembered that Yuanyang had indeed said that this kid's fitter skills were quite impressive.

However, he still had doubts: "Don't brag, kid. Even if you're really that good, can you make a modified AK47 all by yourself?"

Zhou Weiguo was displeased: "Hey, Uncle Zhang, don't provoke me! Regardless of whether it works or not, just give me the tools and time. If I can't make a gun, you can twist my head off and use it as a football!"

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