The "Classic of Mountains and Seas" called coal "stone nirvana", and the Wei and Jin dynasties called coal "graphite" and "coal".

The term "coal" was first proposed in Li Shizhen's Compendium of Materia Medica in the Ming Dynasty.

Both of them are right, Song Gensheng doesn't know the future generations, and Gu Qing doesn't know the prehistory, so around how to call "coal", the two had a polite gentleman's dispute.

The argument was not too intense, and Gu Qing only felt that his hands hurt.

Song Gensheng clutched his aching stomach and happily agreed with Gu Qing's decision, and felt from the bottom of his heart that the title "coal" was simply a godsend, which perfectly matched the cold temperament of its body, and if he refused to use it, he would be guilty of it.

"That's right, it's called coal." Song Gensheng squatted on the ground, his expression a little aggrieved.

Gu Qing admires Song Gensheng's unyielding character, this kind of person is very easy-going, if the two of them go to the restaurant, no matter who treats them, he must be the kind of person who takes the initiative to hand the menu to others, and he is very sensible.

It's just that I dug a hole more than three feet deep and accidentally dug up coal. Gu Qing looked at the mountain he was on.

The mountain is not high, the altitude is less than 100 zhang, the mountain is densely wooded, the shrubs are thick, there is no difference from other mountains, but they have dug coal here, it is obvious that this is an open-pit coal mining belt, there is not much reserve at present, it is estimated that the reserves are not large, after all, this mountain is not big.

I don't know if it's good luck, judging from Song Gensheng's attitude, the people of the Tang Dynasty already knew what coal was, but the title was different, but they didn't seem to pay much attention to coal.

When Gu Qing first arrived, he was still in a state of crossing the river by feeling the stones, and he was still carefully groping to understand this strange world, so Gu Qing's current habit is to ask in advance, and if he asks more, he will not make a big mistake after all.

"Do you know what coal is used for?" Gu Qing asked tentatively.

"Use it to burn." Song Gensheng gave him a strange look.

It's good, at least know the use.

"What are you doing with it?"

"The government often buys it and uses it to make iron, if we farmers can get it, we can also use it, but it is not very useful, usually used for heating in winter, cooking can also be used, but it cannot be used in the house, I heard that in the early years, there were several families burning stones in the house...... Coal, the next morning the whole family died, and there was no way to save it from charcoal poisoning. So we are still used to using firewood, coal is not easy to get, and it is easy to kill people, so it is not a good thing. ”

Gu Qing asked suspiciously, "Why don't you use it to make iron?" ”

Song Gensheng was taken aback: "Are you crazy? Who in the private sector dares to smelt iron privately? Being found by the government is a great crime of exile for thousands of miles, and the blacksmith shops in the city are all run by the government. ”

Gu Qing understood, the Tang Dynasty knew that coal was used for burning, but its role was limited to iron-making and heating, and the laws here were very strict, and the people were not allowed to smelt iron casually, and it was estimated that they were afraid of the people's iron-making and casting weapons.

That's interesting.

Gu Qing had little contact with coal in his previous life, but no matter how waste he was, he still knew some other uses for coal.

And if the uses that Gu Qing knows are practiced, I am afraid that many people in this world will know the preciousness of coal, and at that time, maybe there will be many people competing for this open-pit coal mine, and it is inevitable to bleed desperately, and maybe there will be greater troubles, such as being coveted by the government......

Therefore, the secret of coal production here must be kept secret, and no one should know about it.

The sinful gaze glanced at Song Gensheng faintly, and Gu Qing suddenly had a bold idea.

"Gensheng, what do you think of the scenery here?" Gu Qing asked with a pleasant face.

Song Gensheng looked around inexplicably, and said: "You and I were born here since childhood, and we are tired of seeing the mountains and rivers, where does the scenery come from?" ”

Gu Qing looked at the big pit that had just been dug in front of him affectionately, and muttered, "It must be very comfortable to lie inside...... Would you like to lie down and try it? ”

"Why should I lie inside?" Song Gensheng looked inexplicable.

Looking at Song Gensheng's ignorant appearance, Gu Qing sighed.

Forget it, I really can't bear to poison a stupid and cute guy, even though he is not very familiar with this guy.

"Fill in this pit first, then go down the mountain, and you take me to catch fish." Gu Qing got up happily.

The two of them filled in the pit and walked to the foot of the hill an hour later.

When he was about to reach the edge of the stone pool, Song Gensheng didn't know what to think of, and suddenly grabbed Gu Qing in front of him, Gu Qing looked back at him, and saw that his face was pale, his lips were trembling, and his expression was full of anger.

"Did you just want to bury me in the mountains?" Song Gensheng asked in a trembling voice.

This child's reflex arc is so touching.

Gu Qing categorically denied: "I'm not!" I didn't! Don't talk nonsense! ”

"You, you, you, for that thing called coal, you actually want to bury me?" Song Gensheng's body was as shaky as Sanguan.

Gu Qing subconsciously blurted out: "Because this coal is really important......"

Song Gensheng's body was shocked: "So you really want to kill my mouth?!" ”

grabbed the back of Song Gensheng's neck, Gu Qing pressed him to the ground, Song Gensheng screamed miserably, and the drama spirit possessed by Qiong Yao suddenly scattered.

"I said, you shut up, I'll beat you if you don't obey, do you understand?"

Song Gensheng nodded obediently, at this time he finally returned to reality, and immediately thought that the person in front of him was no longer his little brother, but a rising new generation of village tyrants.

"Ahem, first of all, I don't know you well......"

Song Gensheng's eyes were hurt: "We grew up together, you don't know me?" ”

"The day before yesterday, Ding Erlang beat me, I fell when I ran for my life, my head hit a stone, and I bled a lot, remember? The wound on my forehead is still not healed. ”

Song Gensheng was a little confused, but still nodded.

Gu Qing said solemnly: "The moment I knocked my head was not only an external injury, in fact, I didn't remember a lot of things, including my memory of you." So, it's actually true that I don't know you well. ”

Song Gensheng glanced at him suspiciously, and reluctantly believed it.

"As for just now, I was suddenly lost, and for a moment I really wanted to bury you, I'm sorry, I'll apologize to you first,—— in fact, the feng shui of that pit is really good, gather wind and hide qi, and Wang Sun will be in the shade for a hundred years, you might as well think about it...... Okay, if you don't agree, forget it. In short, in my eyes, you are just a stranger now, I am greedy, I have the intention of killing people and taking treasures, I am wrong, fortunately it is just an idea, I have not actually acted, right? ”

Song Gensheng glared.

Gu Qing patted him on the shoulder affectionately, and said with a straight face: "So, the boat of our friendship didn't capsize, let's swing the oars, and the boat hit the iceberg......"

Strange words often popped out of Gu Qing's mouth, Song Gensheng didn't understand, but he could comprehend some meanings.

At this moment, he was still angry, glaring at Gu Qing and said, "Do you still want to bury me?" ”

"Don't bury it, don't bury it, our friendship is as solid as a rock, and we are good brothers for life."

Song Gensheng's IQ was on the line at this time, and he added: "Won't you use other methods to kill my mouth?" ”

Gu Qing paused, and the thought of "did this guy kick his nose in the face" flashed in his mind, but his pause looked in Song Gensheng's eyes, and he suddenly felt shocked and angry.

"You're hesitating! You hesitated! ”