Ma Chao strode to the front of the forging house, and smelled a familiar smell in his face, and when he saw that the forging room was tightly blocked, Ma Chao had a faint feeling in his heart.

"Those four craftsmen were smelted in this closed room?" Ma Chao turned around and asked.

"Yes, young master." Pu Yuan thought that Ma Chao was just touching the scene, and replied sadly.

"Open the door." Ma Chao commanded.

"Young master, no, there are already unjust souls stranded in this house, and no one can enter before seven days!" Zheng Hun's face was nervous, listening to the words, he seemed to have a lot of superstitious thoughts.

"Open, those four craftsmen, will they still find me to ask for their lives?" Ma Chao said sharply: "Open, I want to go in and have a look!" ”

Pu Yuan saw that Ma was very colorful, and he didn't dare to hesitate, and stepped forward to open the door. As soon as Ma Chao entered, a strong smell came to his face, Pu Yuan covered his mouth and nose, and the scene of his eyes couldn't help but make his soul fly: Ma Chao actually strode in!

"Young master, no!" Pu Yuan stretched out his hand to pull, but he pulled it empty, and Ma Chao had already strode into the house.

"Young master!" The craftsmen watching outside all exclaimed in amazement, looking inside with wide eyes. As soon as Han Ying gritted his teeth, he took the lead in running in, while Zheng Hun and Pu Yuan were stunned for a moment, and then followed quickly.

The room was not large, and there was a strong smell of carbon monoxide, and in the smelting stove, there were some half-white and half-black stones sandwiched in a pile of gray-white powder, and under the hearth, there was a large pile of black stones that had not been burned.

Ma Chao picked it up, took a closer look, and sure enough, it was coal, and there was a burst of ecstasy in his heart, but he immediately tightened it again: "Quickly open all the doors and windows to keep this room ventilated!" ”

Everyone didn't know what it meant, but seeing that Ma Chao's tone was unquestionable, Han Ying, Pu Yuan, Zheng Hun and others also quickly moved to open those doors and windows. Suddenly, a breath of early winter blew in, making the four of them shiver faintly. However, in this way, the feeling of nausea, vomiting, and dizziness when I came in before was much more relaxed.

"Did the four craftsmen have headaches, shortness of breath, and convulsions before they died, and did they turn blue after they died?" After the three of them opened the window, Ma Chao asked Pu Yuan.

"How did the young master know?" Pu Yuan and Zheng Hun were shocked, in this situation, Ma Chao said just like Qin Jian.

At this time, Ma Chao was already sure that these four people died unjustly and died of carbon monoxide poisoning......

But what can this be, four living lives, after all, are gone. Even though Ma Chao found the answer to this mystery, he couldn't bring the four of them back to life.

One thing is certain, though, that I can't let these craftsmen be superstitious anymore.

"This coal ...... Beast charcoal is not used in all smelting furnaces, so why not smelt outside, but in this hut? Ma Chao picked up the coal and asked with a frown.

"The young master doesn't know that this beast charcoal ancient book has long been calculated. Used in smelting, the temperature is extremely high and long-lasting, but this beast's carbon black is ominous, highly toxic, and the user needs to take life as a guide. The subordinates came to keep it secret, and secondly, because they were lucky, they wanted to see if this beast charcoal could be used in this smelting......" Pu Yuan said, and couldn't help but kneel on the ground again. It is said that it is because he is greedy for merit and is bent on getting the steel as soon as possible, so he does this method.

"You mean, only this little smelting furnace is made of coal...... Beast charcoal, and in other external smelting furnaces, all the wood is burned? Ma Chao was a little crazy now: he took it for granted, modern people have long been familiar with coal, and he didn't know much about it, but he didn't want to, it turned out that the craftsmen of the late Han Dynasty didn't know the role of coal!

"Yes, exactly." Zheng Hun replied.

"And where does all this coal come from?"

"There is a mine in Xinping County, and Lord Han Feng escorted back a batch of them for suppressing smoke at the beacon fire. His subordinates were brave, so they borrowed some from Lord Han Feng. This was Pu Yuan's answer.

But Ma Chao didn't know what to say at this time: when he saw craftsmen burning wood before, he thought that he couldn't buy coal, or that there was no coal in Yongzhou. But he never thought that this 'black gold' was actually under his rule. And this wealth did not bring him any gain, but it cost four lives first......

Coal and iron have always been important strategic resources. In ancient times, this black gold was actually covered with a layer of superstition, so that the ancients did not dare to touch it. It's really a great sadness, but it is precisely this that makes me cheaper.

In addition to smelting, this coal can also be used for civilian use. If the coal production is sufficient, then I can be careful of the problem of freezing to death and frostbite this year.

Thinking of this, Ma Chao felt a lot of heart. However, it is still a big project to get these people to accept coal and dare to use it. The only way is to defy the law, and with his identity as General Pingxi, I am afraid that he can still convince some people.

"The two of you, although you have smelted this peerless blade, you have made a big mistake in using the technique, and you have lost the lives of four people. If the merit is not worth it, Pu Yuan will be relegated to one class, and Zheng Hun will be reduced for one season, do you two have any doubts? Thinking of this, Ma Chao first told the verdict of Zheng Hun and Puyuan, and then planned to go to Han Feng and ask him to introduce the coal mine situation in Xinping County.

"Subordinates admit punishment!" When the two of them saw Ma Chao's practice of cutting his hair as the head, they had long been convinced, but at this time, they had no intention of asking for merit at all.

"Don't be discouraged by the two of you, I still have two drawings here, and if you two can make up for it, I will not only spare you from this punishment, but also reward you as appropriate. But remember, this incident should be taken as a warning, and there should be no more blood and tears. ”

"No!" Zheng Hun and Pu Yuan took the drawings and bowed to retire.

"Let's go, go find Han Feng." Ma Chao turned to Han Ying and said, but saw that Han Ying was just looking at him in a daze, with some signs of madness.

"What's wrong? Did you really fall into the magic barrier? ”

Ma Chao's hand shook back and forth in front of Han Ying's eyes, and Han Ying reacted at this time. hurriedly opened Ma Chao's hand, and said angrily: "Don't make trouble, let's go, go to Han ...... This has nothing to do with Lord Han! As he spoke, his face turned red.

"What's wrong? Could it be that you fell in love with Han Feng? Ma Chao was surprised, why did he still blush?

He naturally didn't know that his previous expression of true feelings, coupled with the act of insisting on entering the house in order to commemorate the death of these four craftsmen, was really a manifestation of the affection and sex in the girl's heart. In the end, Ma Chao made a reciprocal judgment, so that Zheng Hun and Pu Yuan were punished, showing the main demeanor, Han Ying has long been attached to Ma Cha, how can he not be obsessed at this time?

"If you die!" Hearing Ma Chao laughing at himself like this, how could Han Ying not be angry.

And Ma Chao didn't think it was a pestle, but when it was time to close the door, he silently said to the four craftsmen in his heart: "Righteous man, go all the way!" ”