It didn't take long for Zhang Jiao to leave Nanyang, and he came again.

No, I can't do it.

The last time was because of the miracle medicine that could cure the typhoid plague.

The advent of the miracle medicine has raised the reputation of Taiping Dao to a higher level, making it easier to preach.

Originally, it may have to be planned for many years before he could raise the banner that the sky is dead and the yellow sky should stand.

And now, this progress has been improved a lot......

The time is getting more and more ripe.

Zhang Jiao was very satisfied with this situation, but he didn't want Lu Yu to develop something new.

Gunpowder!

The secret letter said that the explosion of gunpowder was like thunder on the ground, deafening, landslides and earth cracks, and the power was amazing!

This directly silenced Zhang Jiao.

He really couldn't figure out what kind of thing would have such power?

The legendary Rayfa is nothing more than that.

For this gunpowder, Zhang Jiao rushed to Nanyang again without stopping!

After arriving in Nanyang, I met Zhang Mancheng first, and then Lu Yu, and exchanged pleasantries a little, but I didn't even stop, so I couldn't wait to see the power of gunpowder!

……

Fool's Mountain.

It was originally a mine for the imperial court.

However, most of the easily minable surface deposits have already been mined.

The remaining part is a very difficult mineral deposit, so the imperial court put this mine on hold for the time being, and over time, it was directly abandoned.

Now Taiping Road has taken down this place, used gunpowder blasting, and mined the remaining mineral deposits, and it is in full swing.

"The main ore here is pyrite, and there are a small number of iron ore and copper ore."

Zhang Man became Zhang Jiao and introduced: "Because it is too difficult to mine, and the demand is not very high, the imperial court gave up this place and has been abandoned for a long time. ”

"But for us, it's very suitable, it's in a remote location, it's uninhabited, and it's secretly mined, so it doesn't attract much attention."

"Using gunpowder, blasting and mining, we have obtained quite a lot of raw ore so far."

"However, the extraction of iron from yellow iron is very inefficient, far inferior to traditional iron ore."

"But there is no way, there is no way to touch the mine with iron ore for the time being."

"With gunpowder for blasting and mining, we will basically not be short of iron in the future."

Zhang Jiao listened carefully to Zhang Mancheng's narration, nodded, turned his head to look at the disciples of Taiping Dao enthusiastically carrying ore, and asked, "When will it be done again... Blow up? ”

"It should be soon." Zhang Mancheng glanced at it, and then pulled a responsible deacon over to ask, and quickly got an accurate answer.

It was almost done at the moment, and the blasting would take place again in about a quarter of an hour.

The saying of a quarter of an hour existed long before the Western Zhou Dynasty.

The ancients divided the day and night into 100 quarters, so that one moment is equal to 14.4 minutes.

At this time, it will be there in a while, and there is no need to deliberately arrange blasting.

Zhang Jiao, Zhang Mancheng and Lu Yu were chatting.

Soon.

Fixed-point blasting mining is about to start again.

With one explosion after another, craftsmen have mastered how to blast to blast more pyrite.

The experience and summary again and again make them more and more comfortable with the application of gunpowder.

Once you are exposed to and master this new thing, the accumulation of experience is very fast.

Soon.

A flash of fire.

"Boom~!!"

Immediately after that, an explosion that resounded through the sky exploded directly!

Not far away, a huge mushroom cloud rises!

Large expanses of pyrite were blown apart, and fragmented ore rolled down the hillside.

The crowd had already been evacuated, so there were no incidents.

This scene is quite spectacular, and in a trance, it is as if the whole mountain has been blown and shaken!

The absenteeism here has seen many explosions, but the scene in front of them still makes them sigh.

What's more, Zhang Jiao, who saw this scene for the first time?

At this moment, Zhang Jiao's eyes widened, his mouth opened wide, and his face was full of disbelief.

This is the power of gunpowder?!

Although he had been mentally prepared for this explosion, after seeing it with his own eyes, he was inevitably still dumbfounded and amazed!

Zhang Mancheng on the side looked at Zhang Jiao's expression, and his heart blossomed.

Hey, look at what you haven't seen before!

Be scared!

Saying that you know how to thunder all day long, how does this thing compare to yours?

At this moment, Zhang Mancheng completely forgot that the first time he saw the explosion, it was not much better than this, and he was so frightened that he broke out in a cold sweat, worried that Lu Yu would split him with thunder!

Zhang Jiao was surprised for a moment, and quickly regained his composure.

He turned his head to look at Lu Yu and smiled: "Apprentice, isn't this thing better than Leifa?" ”

Lu Yu was stunned for a moment, then nodded with a smile: "That's the truth." ”

"This thing is very powerful, and it must not fall into the hands of the imperial court, otherwise we will not have the slightest advantage in Taiping Dao." Zhang Jiao's face was grim, and he said seriously: "Not only that, once we are known by the imperial court, we will definitely fall into a disadvantage, and our manpower and material resources cannot be compared with the imperial court at all." ”

"Master, rest assured, we have separated each link, and it will never leak out in a short time." Lu Yu nodded and said, "Moreover, the most important thing is not these raw materials, but the formula. ”

"As long as the secret of the best ratio is guarded, even if the imperial court produces gunpowder, it is far less powerful than ours."

Hearing this, Zhang Jiao breathed a sigh of relief.

"Next, take me to see the process of boiling nitrate."

Zhang Jiao didn't mean to take a break, he came to Nanyang this time to see this series of related industries with his own eyes, and then copied the past.

In fact, without him looking, Lu Yu would also hand over this technique to him.

But Zhang Jiao still thinks that it is better to see it with his own eyes.

Everyone came to a natural pit without stopping.

Standing at the entrance of the cave, Zhang Jiao looked at the darkness below, and couldn't see anything, and was inevitably a little surprised: "Do you want to boil in this kind of place?" ”

"If some caves are in a good location, they don't have to be so dangerous." Lu Yu explained: "But in order to ensure that there is enough production, we can't just pick caves with good locations, we also need to have such places. ”

"This is the closest boiling pit, if you want to go to the safer one, you can go farther." Zhang Mancheng said.

"Nope." Zhang Jiao shook his head: "It's okay here!" ”

Those who boiled the nitrate can go down, and there is no reason why he can't.

He has been to so many dangerous plague-stricken areas, what is this little pothole?

Zhang Man wants to persuade him, you want to go down, I don't want to go down! It's bottomless, it's a black hole, and it looks terrifying!

But Zhang Jiao was in a posture of having made up his mind, and he didn't care about Zhang Mancheng's dissuasion.

"If you don't dare, stay on it!" Zhang Jiao glanced at Zhang Mancheng.

Zhang Mancheng subconsciously glanced at Lu Yu and wanted him to persuade him too.

Lu Yu smiled and said, "It's really dangerous to go down, Brother Mancheng should stay up." ”

"I'll go down too!" Zhang Mancheng gritted his teeth, both of them wanted to go down, but he stayed on it, didn't it seem that he was too cowardly?

Several people tied ropes, grabbed the ropes, and slowly slid down.

Lu Yu behaved the most relaxed, practicing all the way to the present, plus practicing martial arts, he was no longer what it used to be.

However, in order to take care of the others, he slowed down and slid down with them.

When I came to the bottom of the pit, there were indeed traces of human life here.

Not far away, a group of people were busy, boiling saltwater.

The smell of the salt water is very pungent, like cat urine.

"You're down to take over? Why didn't I get a notification? ”

Huang Zhong found that someone had come down, and came over to inquire a little strangely.

"It's not a substitute, we're here to check, this is Lu Qushuai, this is Zhang Qushuai, and this is a great sage and good teacher!" The entourage immediately began to introduce.

As soon as these words came out, Huang Zhong showed a surprised expression.

Good guys, they're all big shots!