Returning to 1949, I decided to hand it over to the state.

In this process, Jiang Fan was responsible for proposing the core technical roadmap and performance parameter targets from a macro perspective.

Zhou Chunsheng, on the other hand, demonstrated an extremely formidable ability to translate engineering into practical applications.

He was responsible for perfectly transforming Jiang Fan's forward-thinking concepts into engineering drawings that could be actually manufactured using the existing equipment and processes of Anshan Iron and Steel in 1949.

This is a technological ensemble that transcends time and space.

They repeatedly used abacuses and slide rules to frantically deduce the peak stress and thermal expansion coefficient of each component after the compression ratio was increased.

For some weak points that might break, the two came up with a conservative solution to reduce the burden.

When this engine was originally a gasoline engine, it could produce 40 horsepower. However, after being converted into an agricultural diesel engine, it is no longer necessary to pursue top speed. A stable output of 20 horsepower is sufficient for working in the fields.

In this way, the mechanical load on the entire machine can be reduced by a large margin instantly.

Meanwhile, in order to protect the fragile cylinder block, they optimized the combustion chamber shape and fine-tuned the injection advance angle to make the combustion process smoother, greatly reducing the violent impact of knocking on the cylinder block.

In his search for high-strength alternative materials, Zhou Chunsheng immediately consulted experienced master craftsmen.

The final decision was unanimously made: to use the factory's limited supply of top-quality carbon steel to reforge and machine the piston pins and connecting rod bolts, ensuring the safety of these two most fragile parts.

After finalizing the core components, the two then designed a completely new cooling water jacket and a larger heat sink.

After all, the heat generated by compression ignition in a diesel engine is on a completely different scale from that of a gasoline engine, and the original, flimsy cooling system certainly can't handle it.

So they simply added rough auxiliary cooling louvers directly to both sides of the tractor body.

The intake and exhaust systems have also been redesigned: the intake pipe has been significantly thickened to draw in more oxygen-rich air, and the exhaust pipe has been lengthened and thickened to reduce exhaust back pressure.

Regarding the lubrication system, not only was a higher viscosity heavy-duty diesel engine oil replaced, but the size of the oil pump gear was also increased to ensure the absolute oil pressure when the engine is running at low speed and high load.

In this almost insane, high-intensity calculation, Jiang Fan also learned from Zhou Chunsheng how to use an abacus for engineering conversions.

I must say, it has a unique charm.

When he watched the documentary about the Lop Nur atomic bomb back then, he wondered how his predecessors used an abacus to calculate the atomic bomb data.

Now I'm trying it myself...

My goodness! Once you get the hang of it, this thing is incredibly useful in the days before calculators!

Time flies by in the midst of busyness.

When the last assembly drawing was finally completed, the two of them had lost all sense of time and place.

After organizing and filing the stack of design drawings, Zhou Chunsheng collapsed onto the concrete floor like a punctured balloon, panting heavily.

"Engineer Jiang, I can't take it anymore, I really can't take it... I'm so tired."

Jiang Fan also stood up, painfully moving his sore neck and twisting his stiff waist.

He glanced at the stack of blood and sweat on the ground and instructed Zhou Chunsheng:

"Zhou, blueprints alone are not enough. You need to personally guide the experienced craftsmen in the factory to handcraft these parts step by step."

"In short, get the parts that can be made first. Once the Northeast Bureau sends over a new batch of light tanks, you can directly install this diesel engine assembly and test it."

"As for the outer shell, don't make it too fancy. Just use the original tank parts. Saw what needs to be sawed, cut what needs to be cut, and remove all the useless parts like the turret and turret ring. Weld an agricultural towing frame and power take-off shaft directly onto the rear half of the vehicle's underside."

"The key points of the entire modification plan, all of which I just mentioned, are already noted in the drawings."

Zhou Chunsheng lay sprawled on the ground, one hand supporting his forehead, weakly making a promise:

"Okay, okay, Mr. Jiang, don't worry about it. Leave this to me, I definitely won't let you down!"

Jiang Fan felt a pang of embarrassment upon hearing this: Brother, it seems you said something similar last time.

But since things have come to this, we can only trust this great figure of our time one more time.

Then, Jiang Fan glanced down at his wrist.

The countdown has begun; only forty minutes remain.

Then, he said to Zhou Chunsheng on the ground:

"Mr. Zhou, why don't you lie down and rest for a while? It's too stuffy in here. I'm going outside for some fresh air."

"Hey? Aren't you scared at this hour?" Zhou Chunsheng muttered.

"This western factory area is very remote, dark and eerie..."

To be honest, Jiang Fan is actually a little afraid of the dark.

But between the Great Darkness and the Great Transformation, he was more afraid of disappearing into thin air in front of Zhou Chunsheng.

At night, Anshan Iron and Steel Group loses its daytime hustle and bustle and gains a touch of mystery.

Jiang Fan walked along the wall to a piece of wasteland on the edge of the factory area.

After confirming that no one was around, he found a flat, large rock and simply lay down, gazing up at the starry night sky of 1949.

The watch face on my wrist began to get slightly warm; the countdown had reached its final few minutes.

Jiang Fan slowly closed his eyes, letting the slightly cool evening breeze caress his face.

As the countdown reached zero, a familiar blue light flashed by, engulfing Jiang Fan completely.

……

When he opened his eyes again, time and space had shifted, and he was already standing in that pure white space.

However, this time, he no longer had the composure he had when he returned last time, after all, he now carried a heavy responsibility.

If I suddenly disappear this time, and end up missing for several days in the 1949 timeline, how will I explain it when I go back?

Will Factory Director He think of himself as an unreliable person?

How can we reconcile the matter of buying equipment from the Soviet Union?

How should we explain the tractor modifications made by Zhou Chunsheng?

Jiang Fan frowned, standing there, pondering what excuse he should come up with to smooth things over the next time he returned to 1949.

However, when he sighed and looked up, habitually glancing around, he found that the space seemed to have changed.

The enclosed space that was originally only big enough for two or three people has now more than doubled in size.

The pure white dome seemed to grow even higher, and the ground beneath our feet seemed even wider.

What shocked him most were the doors around him.

The last time he came here, he clearly remembered that there were only a few doors, which led to different locations in 1949, and the door that led to his original time and space.

At this moment, in addition to these familiar portals, a brand new door has appeared out of nowhere on the east side of this space.

The door was made of the same material and style as the other doors, except that a line of numbers floated above its lintel:

【2126】

Jiang Fan was startled.

2126?!

Wouldn't that be 100 years in the future from my original timeline?

One hundred years from now!

If we follow the historical pattern of technological explosion in the last hundred years, how terrifying will the level of technology in the human world be in 100 years?

Has controlled nuclear fusion become widespread?

Has interstellar colonization already begun?

Or has artificial intelligence completely reshaped society?

Is there even a super medical technology that can cure all diseases and extend lifespan?

Now, Jiang Fan is completely convinced that the mysterious watch on his wrist is definitely a superdimensional medium capable of transcending the dimensions of time and space.

Does the appearance of this door mean that I now have the opportunity to go directly to the future 100 years from now to find out what's going on?

An overwhelming sense of shock and an uncontrollable curiosity welled up within me.

Faced with immense uncertainty, Jiang Fan, as if possessed, took a step forward and walked to the door marked 2126.

He held his breath, slowly extended his right hand, and tentatively pressed down.