When Cao Shuo came to the craftsman's workshop, the sky was already slightly dark.

He didn't ask people to invite Mi Heng this time, but walked directly into the door of the craftsman's workshop.

Knowing that Cao Shuo was coming, the steward hurriedly greeted him.

"How's the gunpowder?" When the steward saw the salute, Cao Shuo asked him.

"Hui Gongzi's words have always been under development." The steward said, "We tried stone and iron, but none of them worked well with linen. ”

"That's because you didn't use it the right way." Cao Shuo said: "I told you that there are many places where gunpowder can be used. It's not about what you do, it's about how you use it. ”

The steward bowed his head in response.

Cao Shuo waved his hand and said, "Take me to see it first." ”

"I'll have Migong invited." The steward said.

"Just look, you don't need him to be around." Cao Shuo said: "There is no need to call him. ”

Cao Shuo didn't plan to call Mi Heng over, and the steward didn't dare to say much, so he led him to the place where firearms were developed.

Firearms were developed in a very large house.

The room was empty, with many wooden boxes of equal size.

Walking to the wooden box, Cao Shuo wiped the edge of the box, leaned on the tip of his nose and sniffed: "These boxes are full of gunpowder?" ”

"Exactly." The steward replied, "The gunpowder can't get wet, so it's all in the house to avoid ...... in the rain."

"Gunpowder really can't get wet." Cao Shuo interrupted him: "But it can't be stacked like this, as long as there are sparks, it can blow up the entire craftsman's workshop into the sky." Even if there is no open flame, if it is stacked here for a long time, its internal temperature reaches the point of explosion, and it will be razed to the ground for the craftsman's workshop. ”

Cao Shuo's words made the steward break out in a cold sweat after speaking, and hurriedly replied: "It's our ignorance ......"

"It has nothing to do with you." Cao Shuo interrupted him: "It's also that I didn't know what I explained before. ”

"Show me the firearms you've made." Cao Shuo waved his hand.

Guiding Cao Shuo and the others out of the room, the steward led them to a shed where craftsmen were still busy.

Under the shed, several craftsmen who were busy saw Cao Shuo coming, and hurriedly stood up and saluted.

"No need to be polite." Cao Shuo raised his hand and asked them, "Are you developing firearms?" ”

"Exactly." One of the craftsmen said: "We're figuring out how we can get explosives to blow up firearms. ”

"Did you figure it out?" Cao Shuo asked.

The craftsmen looked at each other and shook their heads.

"Did you make it?" Cao Shuo asked again.

"There is a way, but it won't explode." One craftsman replied, "At most, you can see a puff of sparks, and then there is no movement." ”

"Show me it." Cao Shuo said to the craftsman.

The craftsman took out a square iron box from the side, held it in both hands and handed it to Cao Shuo.

Seeing the iron box, Cao Shuo shook his head with a smile: "You don't even seal your mouth?" ”

The square iron box in his hand had a round opening.

The fuse sticks through the opening into the box and ignites the gunpowder.

The craftsmen looked at each other, all of them with blank faces.

"Do you know why it explodes when wrapped in sackcloth?" Cao Shuo asked the craftsmen.

The craftsmen, who still didn't quite understand, shook their heads.

"Because the gunpowder was tightly wrapped in linen, there was no gap left outside." Cao Shuo said: "When the gunpowder is ignited, it instantly generates high temperature and expansion force, breaking through the outer linen, forming an explosion. It's the same with making iron, in order for it to explode, you must first not leave any gaps. ”

"Why don't you get it plugged up quickly?" The craftsmen were still stunned, and the steward glared at them.

The craftsman who came back to his senses took the iron box and ran to the side to plug the hole.

"How did you create the Quartet?" The craftsmen were busy, and Cao Shuo asked the steward.

"The iron tools of the Quartet are the simplest." The steward replied: "Whether it is filling gunpowder or whatever, it is much easier." ”

"You don't have to worry about it, but it's not much use to send it to the battlefield." Cao Shuo said: "Most firearms are used for projection, this kind of square box, how can the soldiers project it?" ”

The steward was stunned, and hurriedly said, "We were negligent......

"You are developing firearms, but your brains are too bad to turn." Cao Shuo said: "Firearms are weapons that kill and injure a wide area, and of course it is impossible for soldiers to carry them into battle to kill the enemy. We want projections, and sometimes we have to bury them in the ground so that the enemy can trip up and detonate. ”

What Cao Shuo said was nothing more than bombs and mines, but listening to the ears of the steward, it made him feel very magical.

I had never seen bombs or mines, and the patterns that came to the steward's mind could not be the same as Cao Shuo's thoughts.

"There is more than just an open flame to detonate gunpowder." Cao Shuo said: "The violent impact caused the external container to deform, which also caused the gunpowder to explode. You all look into that. ”

"I see." The steward replied: "Don't worry, Childe, with a direction, it won't take long to build it." ”

"The fuse is nothing but a method of detonating gunpowder to let you know." Cao Shuo said: "Actually, I didn't want to use a firearm with a fuse. Recently, the army does not need to go on the expedition, you still have time to develop. I'm telling you that time does exist, but not as much as you think. ”

"I understand what Childe said." The steward bowed his head and answered.

After working for a while, the craftsmen came to Cao Shuo with the square box in their hands.

They plugged the hole with linen cloth, and sealed it with a layer of tung oil, and there was indeed no gap.

Glancing at the processed square box, Cao Shuo said: "It looks like it has some appearance, let's try it first." ”

One of the craftsmen walked towards the open space in the distance with the box in his hand.

Cao Shuo and the others stood in place and waited.

The craftsman lit the fuse, turned around and ran away with his head in his hands.

The fuse ignited quickly, and before the craftsman ran in front of Cao Shuo and the others, the square box made a loud noise.

The sound was deafening, and the earth seemed to tremble slightly.

After the explosion, a craftsman ran towards the tin box.

What he brought to Cao Shuo was actually a box that only exploded on half of the side, and the other half was still intact.

After taking half of the box and looking at it twice, Cao Shuo said: "The explosives should be able to smash it whole, and now there is still half of it left, which can only be said to be insufficient." ”

Looking around at the stewards and craftsmen, Cao Shuo said, "The next time you fill the explosives, you should match the amount and seal the container tighter." It must be remembered that iron tools must be made of round balls, and you should not make such a boxy box again. ”

"Don't worry, Childe, we understand." The stewards and craftsmen bowed down.