[Solemnly explain!The part about bullets in this chapter is all from Baidu Encyclopedia!Xiaobian, don't ask me for tea~ (Although I also really want to go...... ）】

Yang Ziyun, who was originally very happy, lost the good mood just now after hearing that Xu Chen had ruined most of his spirit stones, and said angrily: "What's the matter?"

Xu Chen immediately took out a silver-white metal object from his arms, handed it to Yang Ziyun, and said with a smile: "It was blown up just now, and it was not easy to find it!"

Yang Ziyun took a look, and saw that the silver metal body was no more than the size of a thumb, cylindrical, closed at one end, open at the other, and hollow inside.

"What is this?" asked Yang Ziyun.

"Bullet casings!" Xu Chen replied, then turned around and continued to rummage through the table.

"What's the use of this thing?" Yang Ziyun asked puzzled after playing with it for a while.

"It's for bullets!" Xu Chen replied casually.

"What's a bullet?" Yang Ziyun came across a new term.

"It's used to fight guns!" Xu Chen, who was busy looking for auxiliary tools, said without looking back.

"What are the thugs doing?" the girl was annoyed again.

"Hands, guns are ......" Speaking of this, Xu Chen raised his head suddenly, turned around, and showed a rare trace of embarrassment on his face. But in my heart, I kept rejoicing: "It's so dangerous, it's dangerous!"

"Haha!" Facing Yang Ziyun's curious and puzzled face, Xu Chen snorted, and then said: "Let's put it this way! This rifle is like a longbow, and the bullet is like an arrow, shoot the arrow with a bow!"

"Now you understand, right?"

Yang Ziyun played with the silver bullet casing in her hand again and asked, "How to shoot?"

"Ahem, what's this...... I have to introduce you to the history of the development of bullets and gunpowder weapons!" Xu Chen cleared his throat and said with a foul face.

"Are you going to talk nonsense again?" Yang Ziyun instantly rolled her eyes and glared at him.

"Hehe, I'll try to be as concise as possible!" Xu Chen smiled stupidly, and then said: "Gunpowder, you have already seen this thing, this is one of the greatest inventions of the outside civilization!"

"In fact, gunpowder was tinkered with by alchemy Taoist priests as early as the Eastern Han Dynasty, but it has not been used on a large scale in the military field until now, at most it is only used to set off fireworks. ”

"I'm the first to use it to kill people!" Xu Chen smiled self-deprecatingly.

"And the weapon extended from gunpowder, grenade can only be regarded as the most basic one, and guns are the sign of the maturity of gunpowder weapons!"

"It's just that relying on today's technology from the outside world, it's still far behind!"

"Not long ago, I spent a lot of money to build a cannon. It's just that after a shot, the cannon body began to crack, and the technology of the outside world is far from enough!"

Xu Chen shook his head helplessly.

"And now?" asked Yang Ziyun.

"Now?" Xu Chen's eyes lit up, and he said excitedly: "Now that I can even build a more advanced rifle, what is the artillery?"

"It's just ......" The excitement in Xu Chen's eyes gradually dissipated, and his expression condensed slightly: "The gun I built is actually not a gunpowder weapon at all, but just uses the shape of the rifle and relies on the energy of the rune array to replace gunpowder as a power source." ”

"After all, none of the materials in the cultivation realm can withstand the burning of gunpowder!"

Only then did Yang Ziyun realize that the burning stick in her hand was densely engraved with countless runes.

"Speaking of bullets, in fact, the development history of guns and cannons is from the front-loading type to the back-filling type, which has greatly improved the power of guns!"

"However, the key is whether the fixed ammunition can be successfully manufactured, you don't underestimate such a small cartridge case, many countries in later generations can make rifles, but can not make bullets, and even large-scale imports of cartridge shells used by people every year!"

"The afterlife?" Yang Ziyun grasped a key, and then wondered.

"Hehe, it's nothing! This is not the point!" Xu Chen was shocked and hurriedly snorted.

"Actually, I can't make a bullet case, because I can't make the most critical bottom fire part of the bullet case!"

"Why?" Yang Ziyun was very curious, there were still things that Xu Chen didn't know!

"Because I can't make something like 'mercury thunderate'!" Xu Chen shook his head helplessly and said: "I am a liberal arts student, and I didn't take an advanced chemistry course back then, how can I make such a high-tech chemical product?"

"Back then, liberal arts students?" Yang Ziyun wondered again.

"Haha, don't care about these details!" Xu Chen laughed again.

"Not only this gun, but even if I succeed in making a rifle from outside materials in the future, I will not be able to make a real bullet because I don't have a suitable primer fuel!"

"Then what should you do? If you have a bow and no arrows, do you also have to learn from Zhuge Kongming to borrow arrows from the grass boat?" Yang Ziyun joked.

"Just kidding!I'm much better than him!" Xu Chen raised his head and said proudly: "Although I don't have a suitable base fire, I have a rune!"

To put it bluntly, the bottom fire is to cause the fuel to catch fire by impact, and then instantly burn the gunpowder in the shell, thus firing the warhead. ”

"Although I don't have the base fire fuel, I can completely replace the bottom fire with the rune!"

"It took me a lot of effort to finally combine an explosive rune component in the fire attack rune with a rune component that will cause aura disorder after being stressed, and after countless tests, I finally succeeded in creating this shell!"

"Come and see, this is the cartridge case of the gunpowder bullet that I specially made for the future gunpowder!"

As he spoke, Xu Chen took out another yellow bullet case from his arms, and signaled to Yang Ziyun: "As long as you hit the rune at the bottom of the bullet shell hard, flames will burst out inside the bullet case!"

I saw Xu Chen grab a small hammer and slam it towards the bottom of the yellow bullet case, facing the inside of Yang Ziyun's bullet case, and sure enough, a few small sparks burst out!

"Of course, this is just a template for experiments, after all, it is still made of materials from the cultivation realm, and it can't withstand the burning of gunpowder. ”

Fortunately, the runes of the cultivation realm do not exclude materials from the outside world, they can be carved on the steel of the outside world, and because all the runes are engraved on the outer bottom of the shell far away from the gunpowder burning, the gunpowder burning that occurs inside the shell has little impact on the runes at the bottom!"

"Although it will still erode these runes over time, I estimate that a bullet case can be reused a dozen times!"

"That's pretty much enough!"

"Then why is your silver bullet case full of runes inside and out?" Yang Ziyun shook the silver bullet case in her hand and asked suspiciously.

Xu Chen took it with a proud smile on his face: "This silver bullet case is specially equipped for this gun!"

"This gun is actually no longer gunpowder! It is a magic weapon that imitates the shape of 'Made in Hanyang', uses the ore and materials of the cultivation realm, depicts runes, and relies on the spirit stone installed in the spirit stone trough at the bottom as the power source!"

Xu Chen said, opening a dark grid on the wooden handle behind him, but saw that a shiny spirit stone was inlaid inside, and around the spirit stone, countless runes were densely depicted.

The reason why "Made in Hanyang" was chosen as the prototype of the rifle is because this gun is so famous in modern Chinese history!

It is also the only rifle that Xu Chen can make!

When I was in school, a professor once spent a class dedicated to the military industry during the Anti-Japanese War, and the lecture notes clearly described the complete drawings of this "made in Hanyang".

As a boy, Xu Chen naturally remembers these things vividly, but it has never been possible to make them before, and now that he has the opportunity, how can he give up?

As soon as you press the switch here, the runes on the gun will be activated, and the aura in the spirit stone will be exported, providing sufficient power source for the gun, and then just gently snapping the firing switch, the firing pin will start, and then hit the bullet in the slot and launch the bullet. ”

"The whole process can be used by any individual!"

"If that's the case, then what's the point of our cultivation?" Yang Ziyun asked blankly.

"So this is an artifact that subverts the times! With it, personal force and characteristics will be leveled, and scholars who are powerless can easily kill tall and strong men!" Xu Chen said proudly.

"That'...... So what do you want me to do?"

Intuition told Yang Ziyun that what she was going to participate in next was likely to be a major event that could threaten the entire cultivation world and all cultivators.

However, she was not a cultivator, she was just Yang Ziyun, and she knew that Xu Chen would never be unfavorable to her, this ...... That's enough!

"It's very simple!Help me fill this bullet!" Xu Chen grabbed the silver bullet case and said to Yang Ziyun.

"This gun is not a gunpowder weapon, and this bullet is not a gunpowder bullet, after I can't use gunpowder as an energy source, I can only use aura!"

"The above depictions are all runic components that can maximize the stimulation of aura, and the bottom is also depicted with the kind of rune components that will cause aura disorder when impacted. Originally, I wanted to use the fire rune, but I expected that it might fail, and it would depend on you, so I changed it all to the thunder rune!"

"Now you only need to infuse the aura of the thunder attribute into this bullet case, and you can successfully replace gunpowder and become a new energy source!"

"Can't you yourself?" asked Yang Ziyun.

"Alas......" Xu Chen shook his head with a wry smile and said: "I have tried countless times, and every time it will explode! This requires directly filling the inside of the bullet case with active aura, I am not a monk after all, and the control of aura can only be slightly guided with the help of tools, but I can't directly control it like a monk!"