As soon as everyone heard this, Liu Ping was so good at talking, and as soon as he asked for it, he agreed, and he was all grateful.

Although Liu Ping said no, everyone knew that it was just polite.

If you relocate, the whole family may not even be able to save their lives, so what else do you need treasures?

They threw everything in their hands to the ground, and they all fell backwards.

Liu Ping rubbed his chin, even if they didn't come to ask for it, they would have to do it, and they were really embarrassed to get so many treasures unexpectedly.

He picked up the so-called Cai Yong's authentic handiwork, Cao Cao is an elegant person, and he has always admired Cai Yong, otherwise he would not have ransomed Cai Yong's daughter Cai Wenji from the Huns with his daughter.

This one was given to Cao Cao, and he must have been very happy.

As for Lao Tzu's handwritten silk book "Tao Te Ching", it couldn't be better to give it to Cao Song.

In this era, the folk believe in Taoism, believing that the magic of Taoism can make people immortal, Cao Song, as an old man, naturally wants to live a few more years, the Taoist ancestor handwritten "Tao Te Ching" natural effect is magical.

As for those bits and pieces of jewelry and jade, give them to the future mother-in-law and sisters-in-law, and give them to Cao Jie, they must like it very much.

……

Liu Ping rode out of the city with Tai Shici and Zhang Liao the next day, and they went all the way north into the Taiyi Mountains.

In later generations, Liu Ping once followed the group of donkey friends and traveled here on foot.

Here, in later generations, the mountains are high and dense, the scenery is beautiful, and the roads are not very easy to walk, which is a good place for mountain climbing and camping.

It is said that this kind of local economy should not be very developed, but at that time, Liu Ping unexpectedly found that there were several small villages in the deep mountains that were unusually wealthy.

After careful inquiry, I found out that there were iron mines in the mountains near these small villages, and the villagers could get rich overnight by opening a small mine and setting up a few magnetic separators.

Now Liu Ping is running to a village called Yueshan Village.

Since ancient times, all dynasties have regarded iron as an important strategic material, which shows that the output of iron in ancient times was not high, and it was far inferior to the output of copper.

However, iron is not a rare metal on the earth's surface, so why couldn't the ancients smelt iron in large quantities?

The main reason is that although there is no shortage of iron ore in our Chinese land, there is no deep mining technology in ancient times, and there are not many high-grade ores in the bare ore on the surface.

By the time of Emperor Wu of the Han Dynasty, there were only 49 iron-producing places recorded in the world.

The ancient iron-smelting process, simply put, is to build an iron kiln with clay, put natural iron ore and charcoal in it and ignite it, and use manual air blasting to reach the melting point of iron, and the molten iron will automatically flow out.

This requires a very high taste of iron ore, at least 60 percent or more.

However, although the modern ironmaking process has improved a lot, the most basic principle has not changed, and the ore taste required is still very high.

On the one hand, it relies on the import of high-grade ores, and on the other hand, the local low-grade ores are crushed, purified, and the impurities with low iron content in the ore are removed, and only the parts with higher taste are taken.

Liu Ping of the previous life had been to the concentrator to see it, in fact, the principle is very simple, that is, the ore is mined, the stone is squeezed into the size of a walnut with a crusher, and it is slid through a magnetic roller with a magnet on the half side.

Stones with strong magnetism are attracted by magnets and are sucked out, and those with weak magnetism are thrown off and become waste.

Liu Ping felt that such a simple process, even in the post-Han era, there was no problem with the operation.

First of all, there is no shortage of natural magnets, and there is a record of "magnet recruiting iron" in "Lu's Spring and Autumn Period".

Secondly, although there is no efficient crushing equipment in this era, there are people under him, anyway, tens of thousands of young people in Dongguan County have nothing to do, and it is a big deal to manually crush.

You know, in this era, the value of iron is extremely high, much higher than the value of copper, while the value of labor is extremely low and negligible.

If he could smelt iron from the waste stone in the eyes of the world, then Cao's military salary crisis would be greatly alleviated, and Cao Cao would not have to bother to assign labor to peasant women.

The princes want to build weapons and arrows, and iron is lacking everywhere, and it should not be difficult to find a market.

In fact, this is what he came up with, so that Cao Cao took the initiative to give up the idea of moving.

The reason why Cao Cao made up his mind to move the people of Dongguan County to Xu County was not because Dongguan County was poor?

Therefore, the relocation of the people of Dongguan County to the East Henan Plain will consolidate Xu County on the one hand, and produce more grain on the other hand.

But if Liu Ping smelted iron here and sold enough money to make Cao Cao tempted, Cao Cao would definitely be reluctant to throw away so much money and let the people of Dongguan County relocate.

When the time comes, he may wish that the people would stay and make iron for him.

You must know that the value of iron smelted is much greater than the value of growing grain, not to mention that in this era, the value of iron is even higher.

At this time, the Yueshan Village in front of Liu Ping was a small mountain village with only 100 households, and he remembered that when he came here in the previous life, every family lived in a small bungalow, and luxury cars were parked at the door.

But today's Yueshan Village, with dozens of low-rise thatched houses, is sparsely populated and looks decaying.

"Master, are you sure this is what we're looking for?" Zhang Liao looked at Liu Ping puzzled.

Although they were brought here, they did not understand what Liu Ping's intentions were.

Liu Ping's memory of the terrain is amazing, although this is 2,000 years ago, the shape of the mountain has hardly changed, and Liu Ping can recognize at a glance that this is the village he has visited.

"That's right, let's find a place to stay first."

The three of them dismounted and led them and walked into the village.

In the distance, they saw someone pointing behind their backs, and when they turned around, they all hid.

Suddenly, a peasant woman came over the corner, and Zhang Liao squeezed out a smile to greet her: "This eldest sister, may I ask ......?"

"Ahh

The peasant woman screamed as if she had seen a ghost, turned and ran away.

Zhang Liao couldn't help touching his face: "Am I so scary?" ”

Tai Shici smiled and bent down in the back: "You're not scary, you're ugly, you made the eldest sister ugly." ”

"You're handsome, you go," Zhang Liao said angrily.

"Look at me!" In terms of appearance, Tai Shici's appearance is indeed much better than Zhang Liao's.

He brushed his hair, raised his foot and kicked open a nearby firewood door.

"Anyone? Get out! Tai Shici stood in the courtyard and shouted at the thatched hut.

Zhang Liao: "??? ”

Why are you going to kick the door, what kind of hair are you brushing?

Playing arrogant, Lao Tzu won't or what?

Before Tai Shici's words fell, he saw a young man rushing out of the house, holding a spear in his hand: "Thief, take your life." ”