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What Qu Yong was worried about was the clan members of Qu Wentai's sons in the past.

But hearing Yan Kai's words gave him a lot of confidence.

Qu Wentai was sent to Chang'an and was in the hands of the Tang Dynasty. As long as he had the support of the Tang Dynasty, at least these people would not dare to do anything too outrageous for the time being.

Now there is one last question. Qu Yong looked at Yan Kai with an embarrassed smile and said, "Zhi County Yan, um... the things you mentioned will still cost a lot of money, right?"

Their treasury in Gaochang was almost emptied by the Slavs.

He also knew that those things ended up in Yan Kai's hands, but it was Yan Kai who exchanged them for weapons and equipment, and it was not Yan Kai who robbed them.

The fact that the Slavs attacked Gaochang City under the guidance of Wang Xuance is now a high-level secret of the Tang Dynasty.

So Qu Yong really didn't know that the fact that the Slavs came to rob them had something to do with the Tang Dynasty. He still thought that the Tang Dynasty negotiated for the Slavs to withdraw from Gaochang City.

They even thought that it was because of Yan Kai and the others that the Slavs gave up on sacking Gaochang City.

The Slavs have left, and so has Wang Xuance.

Even if Qu Yong knows the truth in the future, he will probably pretend not to know.

I originally thought that Yan Kai would think about it in a meeting, but unexpectedly Yan Kai said directly: "No problem, I can provide you with an interest-free loan!"

To Yan Kai, this place is regarded as an ethnic minority area in China, so the way it is treated must be different from that of Fusang and Silla Baekje.

"Interest-free loan? Just don't charge interest?" Qu Yong opened his eyes wide!

Sure enough, this Xiaoyan magistrate treats me differently!

"Yes!" Yan Kai nodded: "I'll ask someone to help you calculate how many karats you need to dig for the first step of development, how much it will cost, as well as the grape plantations and wine brewing workshops."

Although Zheng Zhixun is no longer around, there are still a few among the middle school boys who are doing well, such as Wei Shuyu.

Calculating some simple project budgets is not a big problem.

And even if they can't calculate it, they still have millions of dog-headed military advisors, and there are quite a lot of talents inside.

For example, Yan Kai asked in the live broadcast room whether he knew the best way to build a karez, and a group of netizens jumped out.

"I know this question!"

"Hey, what a coincidence, I know this question too!"

“Although I don’t know this question, I will after listening to the teacher’s instructions!”

"Brother, from Harbin?"

"No, this is the first question we asked in Hubei in 19!"

"Oh, I'm from Hajiu Middle School, and this is our monthly exam question for 20 years!"

"Our Chang'an No. 20 Middle School's -year monthly exam questions also tested Qanat."

After Yan Kai asked, he found out that there were quite a lot of questions about karez.

After all, this is one of the four major projects in ancient China. Many students were interested in it and studied it.

Yan Kai also generously gave pocket money to these studious students.

Soon several karez construction plans and grape plantation construction plans were released.

Yan Kai found Qu Yong and gave him the plan. He started nodding without even looking at it: "Zhixian Yan, what you said must be reliable!"

Well, actually, if you really want to read it, Qu Yong may not be able to understand it.

Since Qu Yong agreed, let's start work.

Yan Kai gave money and Qu Yong made people.

Originally, Gaochang City couldn't find so many strong laborers to work, but didn't Quyong originally have thousands of troops?

Although they were taken care of by the Tang Dynasty and again by the Slavs, there are still about 2,000 people left.

According to what Yan Kai said, he paid a high salary, and then used the same salary to hire people in Gaochang City. When the people saw that they could earn five or six hundred yuan a month with food included, they all signed up enthusiastically.

An engineering team of nearly 5,000 people was quickly assembled.

The first step in building a karez is to find a suitable water source where snow water from the mountains flows.

This is not a problem for the locals. After all, many people follow the water source when grazing.

After finding a suitable water source, it’s time to dig a well.

First, they dug a shaft, and Yan Kai took a few craftsmen. They were sometimes repairing tanks and other things along the way, and they came in handy at this time.

Their well-drilling technology in Kuoding County is already advanced.

Under the guidance of these craftsmen, Ma Mahuhu made a set of tools used to dig wells in Kuoding County. Using the wind here as a power source, he quickly erected a row of tall windmills here, and then began to drill. well.

The deepest shaft was even as deep as 60 meters and 20 stories high!

This newly dug karez is not too long, only about 300 meters. The longest karez in history was 25 kilometers long. That was a real major project.

Then there is the digging of culverts between shafts. This is a real big project. It is impossible for Yan Kai to get things like shield machines. The only thing that can help them is the sturdy and durable steel tools produced by modern production.

To be honest, Qu Yong was a little dumbfounded when he saw Yan Kai take out several thousand picks, hoes, and shovels made of fine steel.

Are these called tools? It feels... wrong, it’s not a feeling, it’s that these things are of better quality than their weapons!

With good tools, the project progress will be much faster.

Yan Kai also experienced the wisdom of the ancients with the netizens in the live broadcast room.

If it weren't for the high-precision compass brought by Yan Kai, in the past when these Gaochang people were building the karez culvert, in order to avoid digging the culvert between the two shafts crookedly, they created the wooden stick orientation method.

It is to pull a long rope over two adjacent shafts, then let the rope hang down at the mouth of the shaft, and then tie a wooden stick to the rope underground.

The rope above is tightened, and the wooden stick under the shaft looks parallel to the one above. This means that the direction the wooden stick points is the shortest straight line between two adjacent shafts. They can dig according to the direction of the wooden stick. .

At the same time, they also invented the oil lamp orientation method.

The orientation of the oil lamp is based on the principle of two points forming a line. Two oil lamps with mouths on the sides are used to determine the direction of the culvert excavation, and it can ensure that the top and bottom of the culvert are parallel.

After determining the direction, they lit an oil lamp in the middle of the karez shaft. When digging, the workers always looked at their own shadows to avoid deviation from the direction.

Of course, these are all native methods of the ancient Gaochang people. After Yan Kai provided new work clothes, the compass on the sleeves of the work clothes could prevent these workers from losing their direction.

At the same time, these work clothes can also protect these workers very well.

Because the melting snow in the Tianshan Mountains is freezing cold, and workers digging culverts had to kneel in icy water to dig soil, so in the past, workers who had been digging culverts for a long time generally lived less than 30 years old.

The work clothes provided by Yan Kai were also waterproof and cold-proof, but the workers who came thought they were from their king, Qu Yong. Seeing that the king was so considerate of everyone, it actually improved Qu Yong's reputation a lot.