In fact, in the era of the late Han Dynasty.

It's not without accurate maps, either.

The wisdom of the ancients is still very strong, even the most basic method of shaping mountains and rivers, as well as the method of river differentiation, are enough to draw a topographic map whose outline is basically in line with the facts.

Although the use of human measurements and the rough empiricism of eye and hand coordination, there will be a large error with the actual situation.

But in general, it is absolutely sufficient.

And on top of the rough cartography.

There is also a Jili drum car that has appeared in the Han Dynasty and the Han Dynasty, this thing is specially used to determine the length of the artifact, the use of gear machine expansion, can achieve every number of miles, let the small drum on the car beat.

And so it goes.

All you need to do is reuse the scale and grid lines to create a map that is extremely accurate.

These are just a few of the ways they are listed.

All have big flaws.

One is that it is extremely difficult to make.

This method of mapping is time-consuming and labor-intensive, and even if a drum car is used, it must be driven by a special person, and even the sound of the drum must be recorded.

With such a large area as a state, the manpower and material resources consumed are really unknown!

Therefore, the more accurate the map, the more expensive it is, and the rarer it is, and even the more expensive it is, you may not be able to buy it for money.

Here's an example.

With Cao Ang's current identity, he only has a rough and sketchy map in his hand, which is the copy that belongs to the county guards.

Only the approximate location of the mountains and rivers is marked, and the various cities are pointed out, and sometimes the road is driven according to this map, and even the wrong path is even taken.

According to Cao Ang's guess.

It is estimated that only the old comrades who have worked in the imperial treasury or in the land of a state for many years will have the most accurate map in their hands.

The second is the limitations of the times.

Longitude, latitude, and even other epoch-making factors have not been taken into account.

As a result, the larger the map covers, the greater the error, which is unavoidable.

In addition to that, there is less content to be labeled.

……

And compare the two.

The map that Cao Ang has now fished out of the river, made using modern cartographic techniques, has obviously formed a dimensionality reduction attack.

Not only is the accuracy extremely high, but the error is pitifully small.

Used on the battlefield, it can be called a strategic-level artifact, and in the future, it will be reproduced by everyone for important generals such as Zhang Liao in the army.

The distance traveled during the march, the number of days it takes to lead the army, and the precise setting of ambushes according to the terrain are probably no longer illusory ideas.

And most importantly.

It's that resource points are also marked on this map!

Come to think of it.

Cao Ang couldn't help but feel a little emotional.

Isn't this sleepy to send pillows?

At present, he is in urgent need of various mineral resources, but the resource points that have been developed by the imperial court are not currently within the scope of Jiyin County.

By the time his father Cao Cao took control of the entire territory of Yanzhou, and then took over these minerals that nominally belonged to the imperial court, I am afraid that a long time has passed.

This greatly delayed the progress of the project.

But with this topographic map of Yanzhou, it is different, and he can find those mineral resources that have not yet been explored very accurately.

You don't have to run around like a headless fly anymore.

It is best to be within the boundaries of Jiyin County.

With the mobilization of manpower mining, it must be more than enough to cope with the consumption in a short period of time.

……

Carefully roll the map back up and put it back in the box.

Cao Ang habitually came to the stele.

If nothing else, he just wanted to see the notes.

When you look up.

I saw that a few lines of text had been displayed on the stele, just as in the past.

"Item Name: "Yanzhou Topographic Topography Map"

Purpose: Observe and use

Note: If you can collect all 13 maps of Yanzhou, one of the thirteen states of the Han Dynasty, it will be automatically assembled into a national map and randomly evolve with new features. ”

This note really didn't disappoint.

At a glance, Cao Ang felt refreshed.

Before, he was still worried, if there was only a map of Yanzhou, then in the future, the Cao family's power would be beyond the scope of Yanzhou, wouldn't there be no map available?

Now it seems that the worry is unnecessary.

As long as he breaks out a few times and catches all the maps of the states in the world, he can not only synthesize the national map, but even have new functions.

Although it is not known what the alleged new feature is.

But it doesn't disappoint.

…………

Seven days later.

It is located in the southeast of Jiyin County.

Cao Ang, who galloped all the way with a large number of people and horses, was holding a part of the map that had been rubbed and copied at the moment, and was calculating and comparing it.

After getting off the ship.

The first thing Cao Ang did was to immediately find the resource point and start arranging for people to mine it.

Just according to him after some searching.

However, it was found that in the entire territory of Yanzhou, the number of coal mines is the largest, and almost all of them are distributed in the eastern part of Yanzhou, that is, Taishan County, Jibeiguo and other places.

Iron ore is not Yanzhou's dominant resource.

In the entire territory of Yanzhou, there are only a few large-scale iron mines, which are also within the scope of Taishan County, and one of them is a government-run iron mine that has been excavated and mined by the imperial court.

As for the copper mines.

There are almost no such things in Yanzhou.

Searching through the entire counties of Yanzhou, at best, in the east, as well as some locations in the north, found a few small copper mines.

It's completely useless!

The western part of Yanzhou is very resource-poor.

Among them, Jiyin County is especially so.

Come to think of it.

Cao Ang felt that it was really a hell to let Dong Zhuo arrange for his father Cao Cao to serve as the taishou here.

……

But it's reassuring.

There are no big mines in the county, but two or three kittens can still make up.

Three of them are coal mines.

One is north of Bo County, south of Dingtao, and the junction of Yanzhou and Yuzhou Liangguo.

One is in the southwest of Juye County, adjacent to Onozawa, at the junction of Jiyin County and Sanyang County.

The last place.

It is where Cao Ang is currently located, on the southeast side of Danfu County, where there is also a coal mine.

And it's also a very coincidental thing.

That is, the only iron mine in the entire Jiyin County, which is also in the southeast of Shanfu County.

Although it is a rather barren rare mine, it seems to be difficult to mine.

But Cao Ang does not want to develop industrialization, with the current weak consumption of the entire Cao family's power, this small vein is absolutely more than enough.

In the future, there will be a big shortage of iron ore.

At that time, he had already rushed out of Yanzhou, and maybe he had already occupied several places and had huge resources.

So don't worry at all.

So all things considered.

Cao Ang took advantage of the limited time and brought a large group of people to Shanfu County, a good place that could mine coal and iron ore at the same time.

……

"Boda, this is the place in front of you, and in the next few days, your only task is to recruit people to dig here."

"All your original responsibilities are temporarily relieved, and you don't have to take care of the affairs of the county, and when you dig up charcoal or iron, you immediately send someone back to report to me, and I will have a heavy reward at that time!"

Boda is Ren Jun.

Previously, when the father and son of the Cao family led the Chenliu Alliance and went west to defeat Dong Zhuo, they stayed in Zhongmu County for a while.

At that time, it was this person who led hundreds of people from the Menke clan to defect, and after the Cao family's army fought against him, he is now also a small official in the county.

This person may not be impressed.

But if you want to mention Cao Wei's tuntian system, you can connect it with Ren Jun.

Ren Jun and Zao Yi, these two are both great contributors to Cao Wei's implementation of the Tuntian system in the original historical trend.

A good hand in agricultural production!

The Cao family can operate the war machine with confidence, and the logistical support of these two talents is indeed indispensable.

Cao Ang originally planned to keep Ren Jun, and after he took control of the entire Yanzhou, he would let him implement the tuntian system and be in charge of agricultural production.

It's just that there is a real shortage of people now!

Count it all over again.

Under Cao Cao and Cao Ang, those who can be named and have the ability to block one side on their own have basically arranged irreplaceable tasks.

Either it is recruitment, or giving advice, or serving in the army, in short, you can't leave.

It's just these two guys who don't have any big deal now.

Therefore, Cao Ang simply brought Ren Jun over, and Zao Yi left him alone for the time being.

Think about it here.

Cao Ang couldn't help but shake his head.

There is still a shortage of talents under his hands, and characters like Xun Yu and Xun Yu are standing at too high a level.

On the contrary, the middle-level cadres are a little out of gear.

It's a real nuisance.

I can only wait for the future to find a way to recruit more.

……

At this moment, Ren Jun listened to Cao Ang's instructions.

I couldn't help but turn my eyes to the wasteland in front of me, which looked rather bare.

Then he said with a little worry: "General, is there really charcoal and iron here?" ”

Originally with his character.

It is impossible to do anything to question Shangguan.

But it's a bit magical.

Previously, he was a petty official in the county government, although his official position was not large, but he was more or less the number one person, not to mention that the entire clan disciples defected with him, and the foundation behind him was also solid.

It turned out one day.

Suddenly, a notice came from above, saying that it was the number two person in the county, and the son of Taishou was looking for him.

With heavy troops in hand, a noble son who can participate in many big and small things of the entire force, and has super high decision-making power, this is by no means a gentleman who eats and waits for death.

Such a big man is looking for himself, most of them have some errand, so Ren Jun is quite happy in his heart.

As a result, this General Cao in front of him.

After asking him some information, he took him and led a large number of people to come straight to this place.

There was no preparation.

Pointing to a wasteland, he said that there was a mine in this place in front of him, which is indeed a bit ridiculous to think about.

And looked at Ren Jun's eyes full of worry.

Cao Ang waved his hand.

He said confidently: "Bo Daling just arranges for people to excavate, since I said that there is, then there must be one here!" ”

"And you don't have to worry, as long as you do your best, even if you really don't find charcoal and iron in the end, I will remember your hard work!"

That's what I said.

Ren Jun was a little embarrassed.

When he questioned it, it was not simply for the sake of his own merits or official position, but just for the sake of doubt.

That's why Cao Ang said so.

Ren Jun didn't say much.

After bowing to Cao Ang and bowing, he said solemnly.

"General rest assured, your subordinates will do their best to live up to your trust!"

……

We just like people who do things practically!

Cao Ang heard this.

Immediately nodded happily.

Stretched out his hand and patted Ren Jun on the shoulder.

Then he told him: "In the process of prospecting and mining, if you need anything or encounter any trouble, you can send someone to tell me." ”

"I'll do my best to help you out!"

Ren Jun said loudly again.

After the command is due.

Cao Ang turned around again, looked at the wasteland in front of him, and began to think in his heart.

Actually, he knows it.

Now that the mineral deposits have been found, the next challenge is the lack of manpower.

Like recruitment, mining also requires young men, and the young and middle-aged labor force is a resource regardless of the state or county.

And drudgery like mining a mine.

If you don't give enough food or money, then the treatment is really not as good as working hard in the army.

Therefore, it is not easy to have a large number of miners who mine ore in a short period of time.

Come to think of it.

Cao Ang had another idea in his mind.

It is not yet known that it will be the Year of the Monkey to recruit miners by ordinary methods, but there is a very reliable and fast channel that seems to be able to be exploited.

……

After everything is arranged.

Cao Ang left behind most of the men.

Just took Dian Wei and a few other more than ten people back to Dingtao County, due to the number of people streamlined, so the speed of return was much faster than when they came.

In just a few days.

He had arrived at the foot of Dingtao City.

Just as soon as it got closer.

Cao Ang realized that something was not right.

Dingtao County, as a county, is to a certain extent the most developed town in the county, as long as there are no special circumstances, the four city gates are all open during the day, allowing pedestrians to come and go.

However, when Cao Ang arrived today.

There was only one passage left at the south gate for two or three people to walk side by side, and there were a large number of soldiers guarding behind the gate, and anyone who entered the city had to go through very strict inspections.

And after entering the city.

The atmosphere in the whole county is even more tense, and the pedestrians and carriages that used to come and go, as well as the shops selling on both sides of the street, have disappeared without a trace at this moment.

And that's not all.

There are even soldiers patrolling back and forth in the streets.

One by one, they were neatly dressed, holding sharp weapons in their hands, and their faces were solemn and solemn.

With the squad as a unit, they constantly patrol the main streets of the county, and when they encounter people wandering around, they will even severely reprimand, and after checking their identities, they will be driven home.

Such a high-alert look.

Let Cao Ang know that something must have happened, and there is a high probability that a war will break out.

He didn't dare to waste time.

After ordering one person to send his suits to the mansion, he took Dian Wei and went straight to the Taishou Mansion.

And at the moment, it is too guarded in the house.

Cao Cao, the Taishou of Jiyin County, was gathering all the generals in the army to discuss the military emergency.

……

Recommended commuter passes

(End of chapter)