Zhou Zhengqi was almost about to jump again.

Lin Haobo hurriedly said: "Coal, coal!" ”。

Lu Yishuang sighed, licked her lips and said, "Oh, coal!" ”

"Two days ago, I was on the street and saw a few pieces thrown outside the door of a house, and I thought you all knew each other!" Lu Yishuang smiled and said, "Then we might as well ask that person and see where he found it." This thing will appear one by one, and it will never appear alone. ” 。

Zhou Zhengqi immediately rang the bell and called someone to come and asked him to find someone according to the place Lu Yishuang said.

A short time later, the guards walked in with a middle-aged man in ragged clothes and a panicked expression.

As soon as he entered the door, the man fell to his knees and kowtowed. "O lord! The grass people didn't commit any crimes, but the grass people were wronged! ”。

Zhou Zhengqi glanced at the guard, and the man's face turned red all of a sudden.

Zhou Zhengqi said gently: "Don't be nervous, I have something to ask you!" Answer, this silver will reward you! So saying, a piece of silver for five taels was thrown in front of him.

When the man saw that there was money, he was just asking questions, and he immediately wept with joy.

"Yes, yes, what does the big master want to ask, the little one must tell the truth!"

"It's nothing!" Zhou Zhengqi motioned for the guards to bring up the black charcoal. "Where did you find this stone?" Zhou Zhengqi asked gently.

"This, sir, shouldn't I take it?" The man said in a panic: "The grass people have picked up these pieces, and they are in the dry ditch in the west of the city!" ”。

Zhou Zhengqi glanced at Lu Yishuang with a smile and said to the man, "Then you can take us over to have a look!" ”。

More than 20 miles west of the city, there are rolling mountains. The rain has washed out countless ravines and overgrown with short grass and shrubs.

But there are almost no trees for success. A small tree that is a little more decent will be cut down.

It's the beginning of summer, and the hillsides are green. There were flocks of snow-white sheep that bleated from time to time.

"This is it!" Lao He pointed to the ravine full of rocks in front of him and said to a few people.

"Let's go, go in and have a look!" Zhou Zhengqi nodded and said to Lu Yishuang and the others.

Lu Yishuang found out that it was a mistake to come out. This dress and embroidered shoes are not suitable for walking in the wilderness at all.

In a hurry, I should change to men's clothes.

Lin Haobo couldn't protect himself, but he still wanted to take care of Lu Yishuang.

Zhou Zhengqi said: "Don't go in!" We will tell you what we see! ”。

Lu Yishuang saw that she really didn't succeed, so she smiled and said, "It's okay!" Anyway, I just watched it, and I didn't understand the method of exploring this vein. If you go back, you can find someone from the Ministry of Works! ”。

Speaking of the Ministry of Industry, Zhou Zhengqi suddenly remembered something. "Did you meet someone who told him about renovating a loom?" Zhou Zhengqi suddenly asked.

"yes!" Lu Yishuang said with a smile: "I met an old man yesterday, and people look really spirited!" I just chatted casually! ”。

Zhou Zhengqi shook his head and said, "Fortunately, this person has no malicious intent!" Otherwise, if this thing spreads, your situation will be in danger! ”。

Lu Yishuang stuck out her tongue and said playfully: "It's just a casual chat, how can it be so serious?" ”。

Zhou Zhengqi said: "That's not what I said! I don't know how to do this, though? But I'm afraid that some people will take precautions and turn against you! ”。

As soon as he said this, Lin Haobo and Zhao Wuju were shocked. Qi Qi looked at Lu Yishuang with a solemn face.

Lu Yishuang smiled, in his previous life, he was in a relationship with people about current affairs, and he really said whatever he wanted. It's careless.

"Yes, I'll pay attention in the future!" Lu Yishuang hurriedly nodded in response.

As he spoke, a guard had already walked out holding a few black stones.

Lao He smiled and said, "That's it!" ”。 He also dropped the coal in his hand and said to a few people: "This stone is of no use except for being able to draw a path on other stones!" Building roads and houses is too brittle, and it's not hard at all! ”。

Zhou Zhengqi ignored him, but asked the guards, "What's the situation inside?" ”。

"General, there are a lot of such black stones in it, and they are of different sizes! Captain Li led people to the depths to see if they could find anything else! ”。

"How does this work?" Zhou Zhengqi looked at it over and over again, frowning.

"This is coal, and it can't be lit!" Lu Yishuang said with a smile: "Let everyone find some hard wood, make a fire, and burn it." ”。

She was originally from the north, and when she was a child, she saw the fire burning at home for the New Year.

Find a few rocks and build them up, leaving room for firewood underneath. They stacked the coals they had picked up.

When they had found firewood, let them make a fire.

Wood burned the dead bushes, and the flames licked the coals above. After a while, the coal began to bloom with red flames and wisps of black smoke.

"It's on!" The people next to him all cried out in surprise.

The wood below is almost burning, and there are guards who want to add to the fire. Lu Yishuang smiled and said, "No need, it will burn by itself!" ”。

The red-hot coal below ignited the coal above, and the red-hot flames scorched and made people take a few steps back.

"Well, that's a lot of firepower!" Zhou Zhengqi nodded and said solemnly: "This matter is very important, I need to explain it to the emperor." ”。

"I want to tell the emperor." Lu Yishuang said with a smile: "This coal is available in many places in China. In the past, people didn't know what to do, so that's it! Now that we know it, we need the state to introduce policies to regulate excavation and sales. ”

"This coal is hidden underground, and it is very risky to mine! If people dig indiscriminately, it will be easy to kill people! Lu Yishuang said solemnly.

"Also, if you want to replace wood for heating, you also have to solve the problem of flue gas emissions. Otherwise, it is easy to have charcoal poisoning! Lu Yishuang didn't want to be reckless for a while and cause irreparable losses to others.

"Okay, let's go back and study it carefully and see how to give advice to the emperor!" Zhou Zhengqi waved his hand and asked people to extinguish the fire.

On the way back, Zhou Zhengqi was silent all the way. Lu Yishuang is also not easy to make a sound. Suddenly, Zhou Zhengqi said: "If you want to do this, it won't be able to do it in a while." The county lord can do the school first. In addition to what you said, the old man can also pack lunch for the students! ”。

"Really? That's great! Lu Yishuang said with a smile: "I believe that with this article, the number of children who come here to study can be doubled!" ”。

Lin Haobo also said happily: "Then I'll immediately find the scholars in the city and see how many teachers I can find!" ”。

"There shouldn't be too many students in the first batch!" Lu Yishuang said: "Let's open a gap first, and when the people in the city see the benefits of reading, they will naturally take the initiative to send their children over." ”

"So, how about we tentatively set it at two hundred?" Lu Yishuang asked.