Sun Qing immediately took a pair of boots for Yin Changying and Yin Cheng to watch.

At first glance, Yin Ji found that this was actually a pair of straw sandals.

The general straw sandals are woven from straw, which is soft and thornless, but there is no hardness at all, and it is not extravagant to weave so long that it can almost reach the calf of an adult man.

But these boots are made of a large leaf cage, which is hard to the touch, and the texture reminds Yin Cheng of the plastic rain boots on display in the museum.

Yin Ji thought about it for a while, and finally found the similar existence in her memory.

"This is cattail?"

Pucao, she has seen a lot in Minjun, aquatic plants, rhizomes are used in medicine, and the leaves are used to weave mats, but they are definitely not so hard.

Is this new type of pampas grass the product of Sun Qing's use of witch power?

Sun Qing hurriedly said, "Huh." ”

With Yin Cheng's understanding of Sun Qing, if it weren't for Yin Changying's order, he would definitely not bother with this kind of thing.

But about shoes, she seems to have only mentioned it once to Yin Changying in the letter when she first went to Minjun four years ago, right? It is said that people do not wear shoes, once they are scratched, it is easy for wind evil to enter the body, and infection to death.

Of course, Yin Changying can't think of this kind of subsection, and the ministers can't think of it, after all, they have leather boots in winter, satin boots in summer, and there are chariots and horses in and out, where would they pay attention to the bare feet of ordinary people?

But as soon as Yin Ji said this, he thought that the people could not wear shoes, but the soldiers must.

Therefore, after Sun Qing arrived in the royal capital, Yin Changying saw that Sun Qing was still quite competent, so he asked him to find a material that was enough to produce shoes on a large scale.

Sun Qing was so entangled that his scalp was about to break.

The first thing that came to his mind was, of course, the fur of animals.

But one is the method of Neidan to make the family, which only Yin Ji and Yin Changying know; The second is that the fur needs to be nitrated, and the steps are also very cumbersome, and the labor cost cannot be saved.

As a witch who has mastered the power of "wood", Sun Qing can only find another way and start with plants.

After four years of research, I don't know how many pieces of samples were scrapped, and finally before Yin Cheng came back, Kankan made the grass shoes.

Thinking of this, Sun Qing couldn't help but pinch a cold sweat for himself.

If the king asks him for results, and he doesn't do anything, then he is doomed.

Yin Changying didn't even look at the grass shoes, and after he was sure that there was such a thing, he directly ordered: "In June next year, I want to see 100,000 pairs of shoes." ”

Sun Qing complained bitterly in his heart, but he didn't dare to disobey: "No." ”

Yin Cheng was stunned for a moment before asking, "Big brother plans to start a war in July?" ”

This timing is a bit strange.

In general, wars take place in spring or autumn.

The former is to sabotage spring ploughing, and the latter is to rob other people's grain by the way when attacking the city, take grain on the spot, save the country and transport it over, how can Yin Changying choose the summer to launch a military attack?

Faced with Yin Hui's doubts, Yin Changying said casually: "Since my country has it, but other countries don't, we should choose the best time." ”

Yin Ji: "......"

She remembered that when she mentioned the section on "wound infection", she mentioned in passing that the weather is hot in summer, and the wound suppurates quickly, and it is not easy to heal. The slightest mistake can kill people.

Yin Cheng didn't want to know at all if Yin Changying had experimented with human life again.

Since he has decided when to go to war, it proves that shoes are secondary, and military equipment, especially those made with the power of "witches", should also be done.

As she was thinking like this, she heard Yin Changying say, "Submit other things one by one." ”

In a few moments, a bunch of things were held by the temple people in front of Yin Hui.

Yin Ji saw a three-edged arrow first.

The bronze craftsmanship of Zhaoguo is already very top-notch. She had seen the arrows in the palace guards' bags, and the three-edged arrows flashed with cold light, ensuring that the person who was hit by the arrow would not stop bleeding.

But at this moment, the arrow in front of her was cast in fine iron.

At this time, although people realized that iron was better than bronze, they still called iron "evil gold" because the smelting technology was not in place.

But with the power of the clans, after being able to heat the temperature of the flame to thousands of degrees Celsius or even higher, iron smelting became an easy job.

As long as the steps of bronze smelting are almost applied to the iron smelting, and slightly improved, a better fine iron triangular arrow can be made.

The same goes for daggers, guns, axes, etc. on the side.

Yin Changying saw Yin Cheng holding the arrow, thoughtfully, thought of something, and said: "Lonely has ordered Shaofu to rebuild Anche with fine iron, does Auntie have any suggestions?" ”

Yin Ji: "......"

She knew it.

Yin Ji didn't plan to comment on the pomp and circumstance of Yin Changying's clothing, food, housing and transportation, she just suddenly came to inspiration: "Regarding Anche, there is no suggestion for the time being." I'm just wondering if the tracks should be paved together when the roads are being built. ”

Zhaoguo also had tracks, and sleepers were laid on the straights to make it easier to transport military rations.

But what Yin Cheng thought of was a track similar to a train or a spaceship.

When building roads, isn't it necessary to reserve tracks in advance?

Therefore, she immediately said to Yin Changying: "Funded by the state, a convoy will be formed to transport soldiers and military rations during wartime; In his spare time, he can be responsible for transporting goods for merchants, carrying people to various places, and collecting fees from them, what does the eldest brother think? ”

The first half of the article alone is actually enough to make Yin Changying nod - Zhaoguo's military expenses are never ambiguous, and there is no such thing as "recovering costs".

For kings and ministers, as long as the road is fast and convenient enough, more suitable for transporting troops and rations, and can lay more land, it is profitable.

However, Zhaoguo built a lot of roads and paved a lot of tracks, but there was never the concept of a national transportation team.

But in Yin Hui's thoughts, aren't the necessary transportation facilities such as roads, trains, subways, and even starships all invested and built by the state, and the state is responsible for operating them?

As soon as Yin Changying heard it, she knew where the difficulty of this operation was: "Auntie hopes that no matter whether there are people or goods to be delivered, the convoy will go back and forth to the scheduled distance?" ”

He knows too well the virtue of bureaucrats, if there is no hard and fast rule on how many times he must go back and forth, and at what time each time, the bureaucrats will definitely move if the businessmen give more money, and the people will not move if they give less money.

Only when the knife hangs over the heads of the bureaucrats will they work honestly.

Sun Qing listened beside him, and said in his heart that this deal is not cost-effective!

How many people travel back and forth to several cities? Aren't they all used by merchants? But if a merchant follows a convoy and passes through various cities, does he still have to pay a "toll"?

It doesn't matter if the merchant pays, but the people definitely can't afford it, which goes against the princess's original intention.

If you don't pay it, the local bureaucrats have lost such a big way to generate income, won't they hate the princess to death?