When he arrived at the foot of the mountain, Li Jiuzhou walked around and looked at the dark ground, unable to contain the joy on his face.

Guo Ziyi didn't understand why he was so excited, so he stepped forward and asked, "Jingdu, why are you so surprised?"

"It's coal!" Li Jiuzhou turned to look at him and said, "I didn't expect there was so much coal in this place."

Guo Ziyi said with a confused look on her face: "What is this? Could it be a treasure?"

"Yes, it's just a baby." Li Jiuzhou was still immersed in joy.

Generally, civilians burn relatively cheap fuels such as firewood, bamboo and grass. The imperial palaces, high-ranking officials and rich people use charcoal and charcoal. Coal has not yet been popular.

Although coal coking technology had already sprouted in the late Tang Dynasty, its technology was truly mature and it was still in the Song Dynasty.

Li Jiuzhou discovered a big business opportunity, so he was naturally extremely happy.

Guo Ziyi looked around and asked loudly: "What are the uses of these things?"

"It's more useful." Li Jiuzhou replied to him, "It can generate electricity, refine, and make fertilizers, but the most useful thing here is to be fuel."

Guo Ziyi didn't understand what he said about power generation and refining, but what's so strange about it when it comes to making fuel?

"It turned out to be something for heating." Guo Ziyi thought it was really a treasure at first, but now she was a little disappointed.

"This is much more valuable than charcoal, and it has such a large reserve." Li Jiuzhou sighed.

This is a piece of open-pit coal that is easy to mine and has a large reserve. This is what Li Jiuzhou is excited about.

I am not the first to discover coal, but I have to be the first to use coal.

Guo Ziyi raised his doubts: "Health is made of firewood and charcoal. If this kind of thing is expensive, who will buy it?"

Li Jiuzhou said: "Just just dig out the coal and sell it to me."

In such a trivial matter, Guo Ziyi did not want to disobey her immediate boss and asked, "How to dig?"

Li Jiuzhou asked him back, "How many soldiers are there in the city?"

"There are more than a thousand people." Guo Ziyi talked about the soldiers who could mobilize, "those who go out to defend the city and maintain public order can mobilize seven or eight hundred people."

Li Jiuzhou shook his head slightly: "This is not enough."

Guo Ziyi also said: "There are more than a thousand strong men who can mobilize in the city."

There are not many people in Jiuyuan City, and the number of soldiers has caught up with the young and middle-aged people in the city. It is just because it is located on the border and is set up to prevent foreign enemies.

Li Jiuzhou looked at him happily, "That's enough. Tomorrow, many people who can mobilize will come to dig coal, get money out of the treasury, and pay their salaries."

"This..." Guo Ziyi slowly lowered her hand, "I'm afraid there is not enough money in the warehouse."

Seeing that he was worried, Li Jiuzhou said, "I will immediately transfer money from Lingzhou to me, so I can't let them work in vain."

The next day, Guo Ziyi summoned all the laborers who could be mobilized in the city and came to the scene. Li Jiuzhou personally went to the scene to command.

"Premier Guo, call your adjutant." Li Jiuzhou turned his head and looked at Guo Ziyi, "I plan to let you go to Lingzhou to teach and generals. In the future, the adjutant will preside over the coal mining matter. You can call someone who is capable and trustworthy."

Guo Ziyi understood and called the adjutant.

Li Jiuzhou then explained the process in detail to the adjutant.

The coal seam is not deep and can be dug in a few meters. The tools people use are hoes, iron elm, etc., so the efficiency is not too high.

First, all the soil covered in the coal seam needs to be dug and transported away, and then the coal is started to be dug.

The coal excavated must be screened with a sieve to remove the soil sand and gravel, leaving behind pure coal.

Li Jiuzhou ordered people to set up a coal storage yard on site and cover it with tarpaulin to prevent rain, wind and sand, or spontaneous combustion.

After explaining to the adjutant, Li Jiuzhou whispered: "Everyone is more careful. I only need black coal and can't mix with mud and stones. If I do it, everyone will have a lot of money in the future, so life will no longer be tight."

As for how coal is coking and making coke, some processes are needed. Li Jiuzhou wrote down the detailed process for the adjutant, asking him to direct the coal first, dig out the coal, and then summoned some craftsmen to learn and make coke.

"The salary of these people is paid once a day." Li Jiuzhou explained to the adjutant again.

The adjutant replied: "Please rest assured by the governor, and you will do your best to complete the humble position."

The adjutant was immediately arranged by the governor and was happy that the leader who was several levels higher than him would not dare to be careless about what he told him.

Looking at a group of busy people, Li Jiuzhou was also dry and took the water bag handed to him by his entourage, took a sip, looked around, and became worried again.

With so much coal, how to transport it out is a big problem.

If you rely solely on a carriage, you can't pull much. The most important thing is that you can't pull much to Chang'an.

His plan was that the main supply of these coals was Chang'an.

Li Jiuzhou wiped the dust that the wind and sand blew on his face. He ignored it for now. Look at this, he had to go to Chang'an to find a sales outlet as soon as possible.

To convince the ancients that coal is more useful than charcoal, it would take some verbal remarks, but Li Jiuzhou was full of confidence.

When Li Jiuzhou thought of doing such a big thing, he was so glad that his previous knowledge of physics and chemistry was not in vain. When he came to ancient times, this knowledge could be used even more.

Advanced knowledge always brings great benefits to people.

Guo Ziyi roughly looked at the scene and asked, "Jiangsu, according to this digging method, I believe that it will take a few months to dig out all the coals."

"You are wrong." Li Jiuzhou took another big sip of water before handing the water bag to his follower and said to Guo Ziyi, "These coals have been accumulated over thousands of years and are buried deep underground. The deeper they dig, the better the coal quality, and it will never be dug for a few years."

Guo Ziyi doesn't understand these principles, so he naturally believes whatever he says.

But he was also very curious about how this young governor understood these principles that he had never heard of. He was obviously more knowledgeable than him when he heard what he said.

But he doesn't look like a family member in the world, let alone so young, how could he have so many experiences?

Then I thought, there are many masters in this world, and aren’t they all famous at a young age, and there are many young men who can remember them all and express them in a straightforward way.

So I thought I was rare and no longer asked why Li Jiuzhou could understand so much.

Li Jiuzhou personally supervised it in Jiuyuan for a few more days.

Since this place is not good at planting crops and raising Dayuan horses is not good, we should develop the coal industry according to local conditions.

If you really do it, this is a great discovery and improvement. You can make a lot of money. At that time, military pay and other preparation materials will be prepared more fully.

What's more, coal can be used for military purposes, but I haven't thought about it yet.
Chapter completed!