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

When I stepped out of the office building, it was already dark outside.

The north wind whipped up snowflakes that stung her face, but Lin Jiaoyue's heart burned with passion.

She tightened her grip on the file folder in her arms and hurried toward the factory gate. Lin Hongsheng was standing by the guardhouse, stamping his feet and breathing out warm air. When he saw his daughter come out, he quickly went to greet her and stuffed the still-warm roasted sweet potato into her hand.

"How did it go? Did the factory manager make things difficult for you?" Lin Hongsheng asked nervously, afraid that his daughter had given herself away.

Lin Jiaoyue took a bite of the sweet and sticky sweet potato, the warmth melting in her mouth. She leaned close to her father's ear and whispered, "Dad, the good days for our Lin family are completely secured. Tomorrow, you can expect to be at the union for tea and newspapers."

Lin Hongsheng's eyes widened. Before he could ask any questions, he saw his daughter stuff the brown paper bag into her handbag and wave her hand triumphantly.

"Let's go home! I have something important to discuss with you and Mother!"

The father and daughter quickly disappeared into the snowstorm, leaving behind only a vague question.

"Dad, when are we going to buy a bicycle? It's too cold walking home."

However, shortly after they left, behind the curtains on the second floor of the office building, Zhao Weiguo watched their departing figures and stubbed out his cigarette.

He picked up the phone on the table and dialed a number.

"Hello, is this the Provincial Public Security Bureau? This is Zhao Weiguo. Please encrypt Lin Jiaoyue's file at Hongxing Factory. The level is... top secret. Yes, from today onwards, no one is allowed to investigate her background except for me."

After hanging up the phone, Zhao Weiguo looked at the snow falling outside the window and muttered to himself.

"No matter what kind of deity you are, as long as you can create something that makes the Americans tremble, I'll guarantee your safety for life."

……

That evening, in the Lin family courtyard.

The curtains were drawn tightly shut, and two layers of old bed sheets were even hung up to prevent light and shadow from getting through.

Lin Jiaoyue spread the "501" document out on the dining table, next to a dim kerosene lamp.

Lin Hongsheng and Su Wanqing sat opposite each other, barely daring to breathe, watching their daughter magically pull out a set of extremely sophisticated drawing tools and several large books with Russian and English writing on their covers from that magical "space".

"Jiaojiao, this...this is the military project?" Lin Hongsheng looked at the dense lines on the blueprint and felt dizzy.

"Hmm." Lin Jiaoyue twirled a compass in her hand, her brows furrowed slightly. "The Soviet design definitely has problems. Their steel is very hard, so they made the gears thin. But the carbon content of our country's steel is unstable. If we copy their blueprints directly, the gears will definitely break."

"What should we do then?" Su Wanqing didn't understand the technology, but she was also anxious. "This is a pledge we've made!"

Lin Jiaoyue didn't speak, but closed her eyes.

In her mind, the enormous spatial warehouse instantly opened. Her consciousness passed through layers of shelves and stopped at an area labeled "Technical Database." This was the information she had specifically asked her father to collect for her.

In her previous life, she studied all the core blueprints of a heavy truck company day and night to optimize their algorithms. Little did she know that they would become her lifesaver now.

"If the materials don't work, then change the structure."

Lin Jiaoyue suddenly opened her eyes, her pupils shining frighteningly bright under the light.

She grabbed a pencil and began sketching rapidly in the blank spaces of the drawing. Not to repair, but to start all over again. She was going to use the "reshaped gear" technique, which wouldn't become widespread until fifty years later.

This technology can increase the force-bearing area of ​​gears by 30% when they mesh, perfectly compensating for the lack of material strength.

The pen tip scratched across the paper, like a bugle call on the battlefield.

Seeing his daughter's focused, almost obsessive expression, Lin Hongsheng quietly tugged at his wife's sleeve. The two of them tiptoed out of the main room and went to the kitchen to boil water and cook dumplings.

They knew that in this family, the moment their daughter picked up a pen, it was a matter of utmost importance.

As night deepened, the snow fell heavier and heavier.

Lin Jiaoyue finished the last stroke and rubbed her sore neck. On the drawing, a new gearbox gear set structure had already emerged. This wasn't just a component; it was a revolutionary breakthrough from the future.

She was just about to stretch when there was a sudden, urgent knocking at the gate.

"Bang! Bang! Bang!"

In the stillness of the snowy night, it sounded especially eerie.

Lin Jiaoyue paused in her movements, instantly sweeping the blueprints and tools on the table into her spatial storage, and casually pulled out a loaded Browning pistol from the storage and hid it in her sleeve.

"Who is it?" Lin Hongsheng called out from the kitchen, his voice wary.

"Old Lin! It's me! The factory's communications officer!" The man outside the door was panting heavily, his voice urgent. "Open the door quickly! Something terrible has happened!"

Lin Jiaoyue's eyes sharpened.

What could have happened at the factory so late? Could it be that the "501" mission has changed?

She gave her father a wink, then quietly crept up behind the door and gripped the handle of her gun tightly.

The door bolt was pulled open, and a gust of cold wind carrying snowflakes rushed in.

The correspondent, Xiao Wang, was covered in sweat, his hat askew. Seeing Lin Jiaoyue there, he stamped his feet anxiously, "Engineer Lin! Quick! Come back to the factory with me! The sample steel that just arrived has a problem. Master Qian insisted on testing the furnace, and it exploded! Factory Manager Zhao wants you to go there immediately to fix it!"