The mine is quite large, and although there are often family members patrolling the surrounding area to prevent the miners from escaping, these personnel cannot prevent Yu Xiu from entering the mine to obtain ore.

And those samurai and the like would not patrol overnight like ordinary family members, and only when the miners rebelled and resisted the whipping, they would draw their knives and carry out fierce suppression.

In the days when Yu Xiu was refining gunpowder, there was almost a small chaos in the mine for three days, and a big chaos in five days, and there were often miners who could not bear the pain in the mines, gathered people to flee, and even grabbed knives to kill the overseers.

However, under the ruthless methods of the Duan family, Yu Xiu never saw anyone successfully escape, let alone cause the Duan family's mine to stop production and destroy...... It can be said that every batch of iron produced by the mine is stained with the blood of one or even several miners.

Fortunately, these things did not affect Yu Xiu's cultivation, he hid in the forest, a little distance from the mine, and even the screams in the mine could hardly be heard.

this day.

Yu Xiupan sat in the cave, with a small copper furnace beside him, which was the Dan furnace he bought from the ghost market, and there were a lot of sulfur powder, saltpeter, charcoal and many other medicinal materials on the side.

He looked at the things in front of him, his brow furrowed slightly.

Yu Xiu had been hiding in the mine for nearly ten days to make alchemy, and the materials he consumed could even make the stream water turbid, but in addition to inferior gunpowder, he had not yet succeeded in refining gunpowder of the same grade.

Inferior gunpowder only has the effect of hurting people, and cannot quench the Yin God, which is similar to the so-called gunpowder in Yu Xiu's previous life. Moreover, Yu Xiu has the concept of refinement in his previous life, and after only three days of pondering, he has successfully refined it.

However, the grade of gunpowder is different, and the medicinal materials, preparation techniques, and refining time required are ...... All kinds are more than inferior gunpowder, and even different.

Especially when refining it, the Taoist priest needs to pay attention to the movement in the Dan furnace with his thoughts all the time, and there can be no distraction, otherwise it is very easy to blow up the furnace and cause the end of Dan destruction and injury.

At this time, Yu Xiu was thinking about it, he was pondering the method of subduing fire in this life, and combined with the memory in his mind, he wanted to find out the trick of refining gunpowder.

The fire method is a method used by Taoist priests to refine secret medicines, use furnaces and fiery fire to concoct mineral medicinal materials and alchemy.

Yu Xiu's fire method in his hand was obtained from the four eyebrows Taoist priest, called the "Three Turns of the Fire Method", which can seal the furnace three times in a row, and strive to give full play to the medicinal effect of the furnace medicinal materials, so as to make the quality of gunpowder stronger and stronger every time.

"Sulfur five taels, wash with stream water, remove sand and gravel, weigh, grind for the end, and use porcelain zygotes. Yu Xiu silently recited the contents of the "Three Turns of the Fire Method", pinched up a small copper scale, and took out the prepared sulfur powder.

"Then seal the mouth with water and red stone grease, solidify the salt mud, and dry it...... The water is full, the zygote is placed on the top, the mud is solidified, the slow fire is raised for half an hour, the sun is enough to add the top fire to the fire, and the cold is taken and researched as a fine ......"

According to the records in the book, he performed step by step, not daring to be distracted at all, until he put all the concocted medicinal materials into the purple copper pill furnace, and then he breathed a sigh of relief.

"The next step is refining. Yu Xiu hurriedly gathered his spirit and paid attention to the Dan furnace in front of him. Suddenly, he pulled out a coin from his sleeve, a brass-colored coin, a yellow coin worth a hundred denis.

I saw Yu Xiu pinching the coin, putting it in from the bottom of the copper Dan furnace, and then carrying the Dan furnace and placing it directly on the red charcoal fire.

As soon as the copper Dan furnace touched the furnace fire, there was a sound inside, and the entire Dan furnace also shook faintly.

At the same time, a bright red yellow light suddenly rose at the bottom of the Dan furnace, wrapping the entire Dan furnace, which was amazing!

What's even more special is that a line of dark red halo appeared on the surface of the Dan furnace, which appeared and disappeared from time to time. Yu Xiu didn't care about the vision in front of him, he looked at it fixedly, and his lips opened slightly: "Out!"

In an instant, his yin spirit shook and immediately jumped out of his body.

As soon as he jumped out, Yu Xiu looked at the copper Dan furnace on the furnace, and saw a trace of yellow aura floating inside and outside the Dan furnace, as if a yellow cloud was enveloping the Dan furnace, and at the same time, the wall of the Dan furnace became transparent, allowing Yu Xiu to see the medicine in it.

Yu Xiu stared at it, quickly pinched his hand, threw out a cloud of thoughts, and entered the Dan furnace. Immediately, the scene in the Dan furnace was vividly presented in Yu Xiu's heart.

And when his thoughts fell on the yellow light at the bottom of the Dan furnace, his perception instantly increased, and he found that the medicinal materials in the furnace were constantly vibrating, as if they were being turned by something.

"Five Emperors Incense Talisman Money, it's really magical!" Yu Xiu felt the scene in the Dan furnace, and sighed in his heart.

Fu Qian is a thing, and the monks who have just entered the Tao need to use it to mix incense and candles and burn the incense in it to protect the yin god and prevent it from being blown away by the wind and the sound.

But that's not the biggest role of Fu Qian.

The real function of Fu Qian is to be attracted by the Taoist priest to the incense, or alchemy, or refining, or array...... Burned as firewood.

What Yu Xiu was doing at this time was to burn the Yellow Emperor's copper talisman coin, and use the incense in it to quench the medicinal materials, so that gunpowder could be synthesized.

If this is not the case, the Taoist priest will need to consume his Yin Divine Thoughts and use his Divine Thoughts to refine the spiritual qualities in the medicinal materials. However, the emptiness of the divine thoughts of the lower third-grade Taoist priests could not affect reality at all.

In other words, if you don't burn money, Yu Xiu won't even have the opportunity to refine the pill.

He pondered carefully, and suddenly noticed that something was wrong in the Dan furnace, so he quickly stopped thinking and jumped back into his body.

He didn't even have time to open his eyes, Yu Xiu directly reached out and pinched the Dan furnace and moved the position to adjust the heat in the furnace.

After some careful adjustments, there was nothing wrong with the medicinal materials in the Dan furnace, and the mutations also stopped, which made people breathe a sigh of relief.

But Yu Xiu didn't even have time to breathe, and jumped out of the yin god again, paying attention to the movement of the Chinese medicinal materials in the furnace.

Next, almost every thirty or forty breaths, he needs to return to his physical body, and use his physical body to adjust the heat of the Dan furnace and the orientation of the medicinal materials to prevent the furnace from exploding.

It's hard work, and it's hard to talk to people.

But even so, when more than half an hour later, the Dan furnace shook irreversibly again.

Yu Xiu closed his eyes and sighed lightly, he reached out and grabbed the Dan furnace and threw it directly outside the cave.

Before the Dan furnace hit the ground, the medicinal materials inside it spewed out in a stream, and there was a lot of thunder and fire.

At this time, Yu Xiu finally opened his eyes, his brows furrowed, and he said in his heart: "If the Yin God can touch the real thing, how good it would be to adjust the medicinal materials in the furnace with his thoughts......"

After many alchemy failures, Yu Xiu found that it was mostly because the Yin God came out and again, and it was difficult for him to adjust the heat of the Dan furnace in time, and it was difficult for him to affect the medicine in the furnace by turning the Dan furnace by hand.

If you can't influence the Dan furnace with your thoughts, you can only rely on the kung fu of the water mill to familiarize yourself with the alchemy process and eliminate these drawbacks.

After pondering for a moment, Yu Xiu suddenly burst out laughing. He refining gunpowder in order to break through the realm, how could he ask for cultivation to reach and then refine medicine.

After packing up his mood, he stood up, looked around the cave, and said in his heart: "There are not many other medicinal herbs, so we should go to the pharmacy in the town to replenish them, and buy some food together." ”

Yu Xiu walked out of the cave, picked up the alchemy furnace, put it in his pocket, and led the horse directly to the town outside the mountain......