In later generations, primary school students will know that these three things are the raw materials for making black powder.

Du He became interested for a while, so he took tools from the side, ground these three things, and then mixed sulfur, saltpeter, and charcoal in a ratio of 1:2:3. Stir well, the simplest black powder is done.

Then, Du He got very playful, found a bamboo tube, filled it with black gunpowder, sealed the opening with wet soil, drilled a hole in the bottom, let some of the black gunpowder inside leak out, and threw it to a different place. In the far corner was a burning stove.

In the blink of an eye, a bright white light appeared in the stove, and there was a rustling sound.

Snapped.

With an explosion, the stove suddenly went out, and all the firewood inside was blown out and scattered all over the ground.

creak.

Yuan Tiangang ran out in a hurry and stared at Du He dumbfounded.

The little Taoist also ran out, hid behind the willow tree, and looked here curiously.

Yuan Tiangang stepped forward and looked at Du He in surprise: "What happened just now? Why did my stove explode without fail?"

Du He pointed to the black powder left on the stone slab next to him, and said calmly, "Is this what exploded just now?"

Yuan Tiangang stepped forward and carefully observed the black powder for a long time, but he couldn't see why, and finally said: "You are talking nonsense, how could this thing explode."

"Okay..."

After Du He finished speaking, he took out a finger of Zhonghua cigarette and lit it with a lighter, and then put the cigarette end on the black powder.

rustle rustle.

The gunpowder ignited at once, emitting a white-blue flame.

"This... this... that's right, this is the ingredient of the Immortality Pill... hahaha!"

"Half a month ago, I also refined it when I was refining alchemy, but I didn't know how to refine it later, and I kept trying... I didn't expect that it was refined by you!"

Yuan Tiangang was shocked!

Ding!

"Congratulations to the host, you got 30 shock points from Yuan Tiangang!"

The shock value was as high as 30, so you can imagine how shocked Yuan Tiangang was!

Then, Yuan Tiangang rushed forward, grabbed Du He's sleeve, and said excitedly: "Quickly, quickly, tell me the formula for refining the raw material of the elixir of immortality..."

Du He looked at the crazy Yuan Tiangang and thought, is there something wrong with this guy's brain?

He looked at the other side curiously: "Do you think this thing can make immortality pills?"

"That's right, you're not the first to refine this thing, and neither am I... According to historical records, during the Northern Dynasties, someone refined something that burned violently and emitted a fairy light, and after seven to 49 days of refining, it grew into a life Immortal Pill, after taking it, you can live forever!" Yuan Tiangang said yearningly.

Du He almost fainted.

Uneducated, horrible.

Chapter 16 Is it a coincidence?

What Yuan Tiangang said was true. Before the Tang Dynasty, there were alchemy priests who inadvertently refined black powder during alchemy, which was recorded as a fast-burning thing. However, out of selfishness, these people did not refine themselves. The method of making black powder is recorded, otherwise, Yuan Tiangang would not have to experiment over and over again.

Seeing what he hadn't been able to get after half a month of trying, was actually made by a young man, Yuan Tiangang was so excited.

The old Taoist grabbed Du He's sleeve and said relentlessly: "Du He...so you are Du Xiang's second son. Today, if you don't tell me the method of refining the raw material of the elixir of immortality, I will kill you." won't let you go."

Seeing this, Lu Bu stepped forward to teach the old man a lesson.

Du He waved his hand and asked Lu Bu to guard the door first.

Du He sat down on the nearby stone, smiled, and said, "Master Yuan, actually, I came to you today precisely because of the courtyard you stayed next to my Laiguo mansion!"

Yuan Tiangang shook his head hastily: "That can't be done, that is my Yuan family's old house, and I can't sell it to you, otherwise my Yuan family will have no foundation."

Du He flicked his sleeves: "You are an old man, you have no children, you are alone, what are you talking about about the foundation of the Yuan family, you really amuse me to death."

"you……"

The Yuan family blushed, but couldn't say a word.

Seeing this, Du He got up and said, "It seems that Master Yuan doesn't want to sell the yard, so forget it, let's talk about it another day!"

After saying that, Du He walked out.

Yuan Tiangang became anxious when he saw it, and hurried forward to stop him, and said anxiously: "Okay, the house can be sold to you, but you must tell me the method of refining the raw materials of the elixir of immortality."

The corner of Du He's mouth suddenly smiled, and nodded: "Yes! But, let's settle the matter of the house first."

"You kid...you're still worried that my old Yuan won't be able to tell a lie. Come on, I'll write you a written statement."

Yuan Tiangang was even more anxious than Du He, and hurriedly asked Qingfeng, a young Taoist priest, to bring a pen and paper, and wrote a document to sell the house, agreeing that the selling price was 500 taels.

Du He also visited the Yuan family's old house. The area is not small, the buildings are complete, and the value is more than 1000 taels.

Unexpectedly, Yuan Tiangang said a second ago that it was the old house of the Yuan family and the foundation of the Yuan family, but in the blink of an eye, it was sold at a low price.

Is this old man insane from alchemy?

Du He also pressed his fingerprints and put away the receipt: "Tomorrow morning, I will send someone to deliver 500 taels of silver."

Yuan Tiangang waved his hands nonchalantly: "It's okay, it's okay, let's talk about alchemy first..."

Before he could finish speaking, he was interrupted by Du He: "Yes, please stop. This thing is called black gunpowder. It is not the raw material for alchemy. If you eat it, you will not be able to live forever, and you may even die."

"Don't worry about it so much, just tell me Fangzi." Yuan Tiangang couldn't listen to a single word.

Du He was helpless, so he picked up a piece of paper and wrote down the black powder formula.

Simply put, it is one sulfur, two nitrates and three charcoals. Primary school students know it. Of course, this is a weight ratio, not a volume ratio.For example, the original firecracker made by Du He just now, because there is no weighing tool, it is only configured according to feeling, so the explosion effect is not very ideal.

Yuan Tiangang put away the formula as if he had found a treasure, and then began to chase people away: "It's getting late, Mr. Du, please come back quickly, otherwise the city gate will be closed later, and the curfew will begin."

Du He was very speechless.

This guy, who was extremely enthusiastic just a moment ago, turned his face and refused to recognize anyone after he got the formula.

Helpless, he could only take Lu Bu back home quickly.

……

Seeing that the sun had already set, darkness gradually engulfed the earth.

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