Zhao Huan, Liu Ying and others surrounded Liu Chang.

Liu Chang had people grind stone flow yellow and saltpeter into powder and put them in two sand pots.

He also had a pit dug in the ground, and put the cauldron in it, and filled it with earth on all sides.

"Brother, stay away... It's my first time doing it, and I don't know if I'll be able to make it..."

Liu Changda said to Liu Ying with a grin.

"What happens if it fails?"

"Brother, do you remember the ore burst just now?"

"Of course..."

"This iron pot may burst and hurt everyone... This thing is very powerful, and a strong bow and crossbow can't match it..."

"No!"

When Liu Ying heard this, not only did she not retreat, but walked to Liu Chang's side in a few steps and dragged him over, "It's so dangerous, don't try!" ”

Liu Chang was immediately anxious, "Second brother, if this thing is made, the efficiency of mining can be increased by a hundred times!" The big man will no longer lack iron, not to mention, this thing can still be used on the battlefield, hey, second brother, you don't understand, you just go over there and watch! ”

"Then I'll just stand here and watch you do it."

"No, what are you fooling around here?! You can't help again! ”

Liu Ying didn't speak, just stood aside and looked at him silently.

Liu Chang was about to speak, but found that Luan Bu also walked up at some point, standing on the other side, Zhao Huan was stunned, scolded his mother in his heart, and walked to their side helplessly. Liu Chang turned around, scolded and began to operate, he lit a few soaphorns, threw them into the pot, and then, the stone flow yellow and saltpeter set up fireworks, Liu Chang waited, and when he couldn't afford the fireworks, he hurriedly took out the charcoal to fry, the flames were steaming, and Liu Chang was sweating.

In this way, when the carbon is eliminated by one-third, Liu Chang immediately annealed, took out the mixture while it was not cooled, and put it on fire.

"Ahh

Liu Chang looked at the mixture and exclaimed, at that moment, Liu Ying stretched out his hand violently, picked up Liu Chang and threw it backwards, the action was fast, without dragging the mud and water at all, and threw Liu Chang, he held his head and waited for the unknown danger.

"Bang...."

Liu Ying didn't encounter any danger, but Liu Chang did.

Liu Chang fell heavily to the ground, clutching his waist in pain, "Even if I fail this first time, you can't fall on me like this... Oh, my waist, my back..."

Liu Ying hurriedly rushed to Liu Chang's side and helped him up.

"Are you alright? I thought... Something is wrong..."

"You didn't have any problems before you fell me..."

Seeing that Liu Ying was so anxious that she was about to cry, Liu Chang jumped up and patted the soil on her body, "That is, I have a strong body, I have been beaten so much over the years, and I am stunned that there is nothing at all, this is by no means something ordinary people can do!" ”

Liu Ying breathed a sigh of relief at this time, and she could still brag, it seemed that there was no problem.

Liu Chang looked at the gray-white particles taken out helplessly, and shook his head, "This is not right at all... Is there too much carbon? Still not broken enough? ”

"Let's try again..."

Facts have proved that knowing the formula is far from enough, Liu Chang has been busy for four or five days, and the gunpowder made is getting thinner and thinner, and the color can gradually match the black powder in Liu Chang's memory, Zhao Huan found a separate place to store these black powder.

After making enough weight, Liu Chang decided to start experimenting with the results to see if he had succeeded.

He first placed the gunpowder in the chiseled ore, sealed it with stones, leaving only one fuse, and slowly stretched the lead to a sufficient length before it began to ignite.

Everyone hid far away, and Liu Chang also covered his ears and stared excitedly, expecting the explosion to happen.

However, the lead burned to the head, and after a long time, there was no explosion.

Liu Chang was stunned for a moment, and waited for a long time before he stepped forward to check.

"Shouldn't it?"

"Do you have to put it in a jar?"

Liu Chang didn't believe in evil and tried a few more times.

Liu Ying and the others were not in a hurry, Zhao Huan also looked at it seriously, after Liu Chang said the so-called explosion method, he didn't dare to underestimate this child, maybe he could really make it, and he didn't know which book he saw it from.

"Bang~~~"

On the third attempt, with a muffled sound, smoke rose from the stone mine, cracking a few cracks, this movement frightened the surrounding miners to shout and flee in all directions, but fortunately, the armorers were not afraid, and soon forced them to kneel, and the chaos around this area did not last long.

Liu Chang looked at the gap helplessly, God knows how much gunpowder he just put in, but this power, this is just a large firecracker, just listen to the sound->>

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, this lethality is too low... Liu Chang was still thinking about whether he could use it on the battlefield, and this power could not be used to scare the enemy.

The specific formula of this thing is too important, but Liu Chang doesn't dare to mix it indiscriminately.... Ahem, it's not that he's afraid of being blown up, it's just that his parents are still alive now, and if a white-haired person sends a black-haired person, how sad it would be.

Liu Ying was stunned again, he looked at the iron mine that had been blasted open, "The eldest brother actually knows the art of lightning channeling?" ”

The eyes of those princes and people looking at Liu Chang were completely different, probably under the influence of Daqin, the people at the moment were very superstitious, and the northwest, which was the future Liangzhou region, became the leader of the Han superstition. It was not until the Eastern Han Dynasty that the government began a series of rectification activities for local sacrifices.

Therefore, Liu Chang's method, in the eyes of many people, is the art of immortals!

Liu Chang still had a bitter face, "Why did you make a firecracker in the end?" Alas, what else can be improved? Think, think well..."

He tapped his temple and meditated.

.........

At this time, Liu Bang, who was about to return to Chang'an, received a letter from Yan State.

The person who wrote the letter was, of course, Lu Juan, who made it clear in the letter that he had thought wrong some time ago, and thought that Zhang Sheng under his command had contacted the Huns, and after he had executed him, he found out that there was a mistake, and he felt guilty in his heart, leaving his clan and preparing to compensate.

Looking at this letter, Liu Bang felt a little strange.

He really knows Lu Juan too well, the two have played since they were born and grew up, and after Lu Juan became the king of Yan, the correspondence between the two has never stopped. Therefore, after seeing this letter, Liu Bang subconsciously felt that there was something wrong with it.

A few days ago, Lu Juan sent a letter to say that his subordinate Zhang Sheng colluded with the Xiongnu and wanted to rebel, and was ready to kill his clan.

That letter was normal, but now this letter.... Although it looks normal, there is not a word of booing and asking for warmth, nor is there a complaint like on weekdays, and there is not even a joke, the whole text is too formal, Liu Bang even wonders if Zhang Sheng has killed Lu Juan and replied to himself under a false name?

Liu Bang hurriedly sent someone to Yandi to find Zhou Bo, who was chasing and killing Chen Xuan, and asked him to see if there was anything wrong with Yanguo.

"Ahem..."

After arranging this, Liu Bang coughed violently, and Zhao Yao on the side hurriedly stepped forward and took the medicine.

Liu Bang took the medicine and drank it in a big gulp.

"The imperial doctor decreed that Your Majesty should not work."

"I know!"

Liu Bang said angrily, and looked at the servant of Liang Guo on the side, "You Liang Guo, what kind of wine do you have?" ”

"Yes, of course there is... Our famous wine here..."

As the servant was talking, Zhao Yao interrupted him directly, he knelt in front of Liu Bang, and said sadly: "Your Majesty! Don't drink alcohol! ”

"The Imperial Physician has instructed that Your Majesty must not drink alcohol! Don't get close to women! Don't be gluttonous! Don't bother! Only in this way can you be healed! ”

Liu Bang laughed and said disdainfully: "You can't drink, you can't enter the harem beauties, you can't set up a banquet, and you can't eat love meat... What is Naigong doing while he is still alive? It's better to die!! ”

"Your Majesty is the co-lord of the world, how can you talk about life and death lightly!"

Zhao Yao hurriedly dissuaded.

Liang Guo's servant was a little at a loss, and he also knelt down in a hurry.

This servant is the servant who betrayed King Liang at the beginning, this time Liu Bang came to Liang State, he summoned this servant and asked him to serve him, people like Zhao Yao absolutely look down on this kind of traitor who seeks glory, and he doesn't care about him at all.

"Forget it, forget it..."

Liu Bang waved his hand and asked Liang Guo's servant to leave, and let Zhao Yao sit beside him.

"The world is finally at peace..."

Liu Bang sighed, and his eyes suddenly turned to Zhao Yao.

"It's all thanks to an upright minister like Zhao Yushi... However, there is one thing I really can't figure out, and I want to ask Zhao Yushi. ”

Zhao Yao looked at Liu Bang in surprise, not knowing what he was going to say.

"You are usually upright and ruthless, and you can always testify in front of them, but I have heard that the people under the Marquis of Jiancheng, seizing people's land, and oppressing the gentle, have never heard of your impeachment, why is this?"

Zhao Yao's face was pale, his lips pursed, his lips trembled slightly, and he didn't dare to speak.

"Minister. When the minister returned to Chang'an this time, he summoned everyone to investigate! ”

"Hahaha, what are you afraid of? I'm joking! ”

"Hahaha~~"

Liu Bang laughed, and Zhao Yao forcibly squeezed out a smile, his face was very ugly.

"By the way, that servant... I'll leave it to you. ”

"Yui, Yui!"