1950s: After transmigrating into a capitalist, I relied on military industry to achieve a comeback.

The workshop was unusually quiet, with only the massive, dark green machine emitting a sickening creaking sound.

Technician Liu was the first to react. His face, smeared with oil, turned bright red, and his hand trembled as he pointed at Lin Jiaoyue: "Nonsense! Absolutely nonsense! Do you know what this is? This is the latest Soviet model; you can't find more than three in the entire province! A crooked bone? Do you think this is a foot massage at a street-side bone-setting stall?"

The surrounding workers also came to their senses, and whispers began to circulate.

"Old Lin, take the kids home quickly, this is no joke."

"Exactly, if we break even a screw, we couldn't afford to pay for it even if we sold our whole family."

Fine beads of sweat appeared on Lin Hongsheng's forehead. He knew his daughter too well; she used to be silly, but now she was unpredictable. He was about to reach out to pull Lin Jiaoyue when he found his daughter standing motionless.

Lin Jiaoyue didn't even look at Engineer Liu; her gaze swept back and forth across the vibrating machine tool.

"The thermal expansion coefficient of the third bearing housing is calculated incorrectly," she said in a low voice, but very quickly, with an undeniable coldness. "The current room temperature in Harbin is minus eighteen degrees Celsius. The workshop heating is insufficient, causing the cast iron base to shrink. However, the gearbox of this machine uses a high-grade alloy, which has a different shrinkage rate. You assembled it according to the standard clearance in the instruction manual. After half an hour of operation, friction generates heat, and the heat cannot dissipate, causing the third shaft to shift by 2 millimeters."

She turned her head, her clear black and white eyes staring straight at Engineer Liu: "This is the source of resonance. If it spins for another ten minutes, the main shaft will break, and then this machine will truly be scrap metal."

Engineer Liu stared wide-eyed, speechless for a long time. He understood, and it was precisely because he understood that he felt horrified. This young girl was spouting nothing but technical jargon, and... the logic was damnably sound.

"You...you're making this up, aren't you?" Engineer Liu stammered, "The instruction manual clearly states..."

"The instruction manual is written according to Moscow standards. Their workshop has a constant temperature system. Do you have one?" Lin Jiaoyue interrupted him without any politeness.

Just then, the workshop door was suddenly pushed open, and a gust of cold wind carrying snowflakes swept in.

"What's going on! It's still not fixed?"

A middle-aged man wearing a heavy military overcoat and with a full beard strode in, followed by several breathless clerks. This was Director Zhang, the head of the Red Star Machinery Factory.

When workshop foreman Wang Dana saw his savior arrive, he almost burst into tears: "Factory manager! This...this machine is weird! Engineer Liu has disassembled and reassembled it three times, and the more he repairs it, the louder it gets!"

Factory Director Zhang's face was ashen. He glanced at the machine still groaning in agony and gritted his teeth: "These parts are urgently needed by the Volunteer Army on the front lines! If we can't deliver them in three days, I'll risk my life to explain to my superiors! What about the Soviet experts? Have we made contact with them?"

"I've made contact!" Wang Dana wiped his sweat. "But the expert is in Shenyang, and the earliest they can come is next week."

"Next week? The opportunity will be lost!" Factory Manager Zhang paced anxiously back and forth.

"I can fix it."

The three words, spoken in a cool and aloof tone, once again pierced through the noise.

Factory Director Zhang abruptly stopped and looked in the direction of the sound. He saw a little girl wearing a patched cotton-padded jacket and with two small braids standing inside the police cordon, carrying a lunch bag in her hand. Next to her stood Old Lin, the new warehouse keeper, looking embarrassed and nervous as he protected her.

"Whose child is this? What are they doing causing trouble!" Factory Director Zhang was furious.

"Factory manager, it was she who said that just now..." Wang Dana leaned over and whispered Lin Jiaoyue's theory about "thermal expansion and contraction" back to him.

As Director Zhang listened, his brows furrowed deeply, and his gaze fell once more on Lin Jiaoyue, scrutinizing her: "Young lady, you know anything about machinery?"

Lin Jiaoyue tightened the lunch bag in her hand; it was a scallion pancake for her father, and it wouldn't taste good if it got cold. She raised her head, her aura as a top engineer completely overshadowing her dowdy attire.

"I don't understand mechanics, but I do understand math and physics," Lin Jiaoyue said calmly. "This machine is currently vibrating at 15 Hz. By adjusting the gear clearance and recalibrating the transmission parameters, we can eliminate the resonance. Give me two hours, and I can not only shut it up, but also improve its precision by one level."

The entire room fell silent.

Arrogant. Extremely arrogant.

Even Lin Hongsheng felt his heart pounding. This wasn't just repairing a machine; it was gambling with his life!

Factory Director Zhang stared intently at Lin Jiaoyue. He saw not a trace of panic in the young girl's eyes, only an almost cold confidence. He had only ever seen that look in the eyes of veteran sharpshooters on the battlefield—absolute control over their target.

The current situation is a dead end. Waiting for the experts is a dead end, but let this little girl try... what if she survives?

"You only need two hours?" Director Zhang's voice was hoarse.

"If you have the right tools, it'll take an hour and a half." Lin Jiaoyue glanced at the scattered wrenches and calipers beside her and frowned in disdain.

"Good!" Factory Director Zhang slapped his thigh, his gambler's blood boiling in that instant. "Let's try anything, even if it's a dead end! I'll take responsibility if anything goes wrong! Wang Dana, clear the area! Everyone follow her orders!"

"Factory manager!" Engineer Liu exclaimed anxiously, "This is state property..."

"Shut up! If you can fix it, then do it. If you can't, then hand me a wrench!" Factory Director Zhang roared.

Without saying a word, Lin Jiaoyue handed the lunch bag to Lin Hongsheng and whispered, "Dad, hold this for me, don't steal the eggs."