Although Ye Fei knew the composition of black powder, he didn't know the specific ratio, and with the little technical strength under the hands of the king of the treetops, he also played with black powder, and the more advanced things were given to him, and he couldn't play at all without that chemical industry foundation.

Xia Zhuoyan turned out the structure of the fire gun from the number of jù kuri and passed it to Ye Fei: "Boss, is it more complicated?" ”

"Let's have a few more things, give them all, and let them get it slowly." Ye Fei said.

The structure of modern firearms is much more complex than that of ancient firearms, but there is nothing complicated at all in terms of specific structures.

But the difficulty in making firearms is not in the structure, but in the material!

Even if Ye Fei handed over the most advanced rifle structure diagram to the treetops, he could only stare dryly without sufficient smelting level.

Xia Zhuoyan sent a batch of drawings to Ye Fei according to his words, and Ye Fei picked out a few of the most classic drawings and said to the treetops: "Your Majesty, I need a room similar to this one, keep it secret." ”

The treetops who had been waiting patiently on the side asked puzzledly, "Isn't it possible here?" ”

"I'm going to carve what you need into the wall, and the walls here are already full of carving." Ye Fei said.

The treetop hesitated and said, "Can it be carved into the ground?" It doesn't get any better place than here. ”

"Yes." Ye Fei happily agreed, walked to the foot of the wall, activated the armor's replication function, and the armor immediately used a laser to carve out the drawings of the fire gun on the marble-paved ground.

He then carved drawings of arquebuses, flintlock muskets, single-shot breech guns, semi-automatic rifles, automatic rifles, and hand-cranked machine guns on the adjacent marble floor tiles.

Each drawing is accompanied by a corresponding exploded view of the ammo to give a more visual impression of the treetops. Ye Fei also pulled him to the carved floor tiles and explained the basic knowledge such as the ratio of black powder. However, except for the fire gun, which is explained in more detail, the explanation of other drawings is all hasty.

Anyway, he won't be able to reach this level for a while, and even if he tells it to the treetops, he can't remember that much.

The treetops didn't dare to ask more, and tried their best to memorize what Ye Fei said, but unfortunately this knowledge was too advanced for him, and only a small part of it could be remembered.

After fulfilling his promise, Ye Fei let out a sigh of relief and said, "Your Majesty, the transaction is over, we should go." ”

"Thank you so much for your generosity. The Divine Messenger is Your Excellency. The treetops said excitedly, "Once upon a time, it was the sacred city of our ancestors that protected us. In the future, we will use the artifact left behind by the divine envoy to destroy the damned Grayskin...... If Shenwei is still there, where will it be the turn of the gray skin to run rampant! ”

"Yes, but the Divine City has been in existence for too long, and it can't protect you forever." Speaking of this, Ye Fei asked curiously. "You and I see that Grayskin's combat effectiveness is not weak. What did you fight for? ”

The treetops shook their heads: "I don't know why. Legend has it that after the disappearance of the city of God, the gray skins suddenly appeared, and they destroyed the country on another continent for more than four hundred years. They have always wanted to destroy us, and if it weren't for the high Soma Mountains that keep them on the other side of the continent, we would have been doomed. ”

Ye Fei was slightly stunned: "I see, Your Majesty the King, we are leaving." Without waiting for the treetops to answer, he activated the pilot device and levitated, flew into the corridor like two nimble fish under the reluctant gaze of the treetops, and casually found a window and rushed outside.

The treetop watched the two leave with extremely complicated eyes, and as soon as the two flew away, he immediately took off a short blade for decoration from his waist, and carved what he had just written down on the ground with all his might, and the sharp blade carved line after line of words on the polished stone slab, even if the palm of his hand was cut by the sharp blade, and the blood dripped down the blade, he did not frown.

These things are so important that it may take decades or even hundreds of years in the future to get what he has forgotten.

The king, who was lying on the ground, was still uneasy after carving it once, and retraced it again and again, until it was deeply engraved on the ground, and then he breathed a sigh of relief, and sat down on the ground tiredly and laughed loudly.

At this time, the window is already clouded, and a new day is about to begin.

It took a while to control the treetops of the love xù, and only then did he realize that he had cut a deep wound in his palm, but he didn't care about pulling all the curtains, and personally covered all the newly carved floor tiles on the ground, before locking the door and leaving this secret room, which was not a secret room.

On the same day, the treetops began to gather the best blacksmiths in the country and began to secretly build the fire gun. and arrange reliable henchmen for the manufacture and storage of gunpowder.

Grayskin's offensive is still continuing, and it is becoming more and more difficult to resist, the wooden wheel that was sent out of the main city by the treetops has not yet returned to the territory, and the news that Purple Cliff City has been captured by Grayskin, the group stopped at Bihu City, which is more than 600 kilometers away from the destination, and the wooden wheel took over the military power of Bihu City as a prince, and tried his best to resist Grayskin's attack.

Two months later, the first batch of explosives made of black powder was sent to Bihu City, and the wooden wheel that was guarding Bihu City put 2,000 explosive bags into the battle at one time, although it failed to completely eliminate the gray skins of the siege, but also wiped out most of this gray skin.

From then on, gunpowder began to become the darling of the battlefield, and the battle of Bihu City also became a turning point in the war.

Ye Fei didn't know what kind of impact his appearance had on this planet, he and Ji Xiaotong flew to a height of more than five hundred meters in one breath and stopped.

I don't know when the rain outside the castle has stopped, but the air is still gloomy, Ye Fei sighed and looked at the dark city under his feet, and issued a remote control command to the flying mecha.

A few guards on the outer wall of the castle suddenly saw a few faint lights coming out of the dark-shrouded square, and before they could raise the alarm, those few lights suddenly rose into the air and soared silently.

Ji Xiaotong took advantage of the time to wait for the flying mecha and said, "Boss, I think that indigenous king seems to be quite reluctant to let us go. ”

Ye Fei laughed: "Everyone is as reluctant as him, I almost thought that he was going to leave us two with gold, silver, treasures and beauties, but I didn't expect him to be quite interesting." ”

"I don't think he dares to keep the two of us, how can he say that he is also a king, how can he leave two divine envoys who can pinch him to death as fathers?" Hong Liang interjected the communication and said, "I guess he'd rather not be paid, but also send you two away quickly." (To be continued......)