I picked up the dragon girl at the beginning and I used artillery fire to liberate the other world

Winter has arrived, and the rising sun shines gently on the Black Iron Castle, dispelling a hint of chill.

Looking from a high place, there was a very decent city wall rising around Black Iron Castle.

"How is it? Is the stone filling completed?" Wald shouted at the craftsmen on the wooden frame.

"It's ready my Lord, you can pour the cement."

As the craftsman's voice fell, Walder gestured to the people around him.

The man nodded, then raised the long whip in his hand and hit the cows and horses. The six cows and horses roared, rushed forward with their strong hooves, and pulled the ropes behind them.

The rope passes through several ingenious pulley systems and is eventually connected to truckloads of cement.

The cement went up along the wooden slope, and after being transported to the wooden frame, the craftsmen poured it into the template that had been filled with stones.

Cement fills the gaps between the stones and binds them together into a single whole.

The same thing was going on in an orderly manner around Black Iron Castle, and at this time the height of the city wall had reached the final stage.

All the craftsmen involved in this project were amazed by it.

This thing called cement is really amazing! Lord Walder said that this thing was researched by His Highness Bai Yan.

"This thing is really great. I wonder if His Highness will let us use it to build a house."

"Haha, let's forget about such a magical thing. Lord Walder said that this wall is used to resist monsters.

Damn it, now we are finally not hiding in that hole in the ground. It was like hell to stay there."

"Yes! This is all thanks to His Highness. He is simply the savior of our Black Iron Castle."

The craftsmen waited for the cement to solidify and began to chat. With the cement, building the city wall was simply too easy.

At this time, the "His Highness Bai Yan" as they called him was lying in a warm bed. There was no other way. Winter was really suitable for staying in bed, and Bai Yan's will also succumbed to his body.

He was leaning against the head of the bed, with a small wooden table in front of him propped up on the bed. The Book of Everything was floating in front of him, and a piece of paper was spread out on the table.

There was a complicated mechanical drawing on the paper. Bai Yan dipped the feather in ink and drew the last part on the paper.

[Preliminary model of internal combustion engine.] After writing this line at the top of the paper, Bai Yan smiled.

He planned to skip the steam engine, the first generation of power conversion device. After all, the manufacturing difficulty of the internal combustion engine was not much different from that of the steam engine, and it could also save more coal and water.

After putting away the small wooden table, Bai Yan hesitated for a moment, but finally took off his shirt and lay down.

Get some more sleep.

After an unknown amount of time, Bai Yan felt his bed suddenly sink.

He opened his eyes dazedly, and saw a beautiful face with a pair of purple and silver eyes blinking at him.

"Human, I'm hungry."

After hearing these words, Bai Yan's eyes suddenly widened, and his original fatigue disappeared completely in an instant.

"What are you doing in my bed?"

Bai Yan felt a little embarrassed. He glared at Alicia and then stepped back.

"Go cook." Alicia looked straight at Bai Yan with a natural expression on her face, as if she thought there was nothing wrong with it.

"I'm not wearing any clothes, you go out first." Bai Yan nodded helplessly. This guy is the owner, right?

"Heh, who wants to look at your body?" Alicia glanced at Bai Yan with disdain and disappeared.

At the same time, outside the Baiyan Gate, Alicia, wearing a maid outfit, walked out from the gap in space.

The originally cool and elegant face now had a blush on it, and even the earlobes were red as if they were bleeding.

She lowered her head silently, muttering, "This guy has a pretty good figure." Then she patted her face and regained some composure.

"Let's go. What do you want to eat today?" Bai Yan came out yawning. The coldness instantly made him sober.

"Sweet and sour pork ribs." Alicia wagged her tail.

"Well, okay." Bai Yan responded and walked towards the kitchen.

Alicia followed slowly behind him, her thick white tail wagging all the time.

After feeding the big female dragon, Bai Yan went out and walked towards the army camp.

According to Gray's report, the army had completed preliminary training, and the blacksmiths had cast about 300 cannons.

After determining the unified specifications of the first generation of cannons, Bai Yan taught the blacksmiths the method of casting cannons with iron molds.

This has also greatly improved the efficiency of cannon manufacturing, and now no less than ten cannons can be produced in a day.

Those artillery shells were manufactured day and night. Thanks to the reusability of solid bullets, the military training did not consume too many solid bullets.

After entering the military camp, Alicia disappeared.

Bai Yan didn't care and looked around the military camp. The soldiers who were originally wearing leather armor and holding spears were no longer seen. Everyone was wearing the light cotton clothes he requested. They were standing in square formations or running, and bursts of neat shouts could be heard from time to time.

"Your Highness, you are here." Gray came over after seeing Bai Yan. Unlike the soldiers, Gray Carlston was still wearing armor and holding a big sword.

"how do you feel?"

"The soldiers are very energetic and their execution has improved a lot." Gray nodded. This training method was somewhat unexpected to him.

Although the soldiers' endurance was repeatedly trained, over time, their morale seemed to have been sublimated.

Just standing there gave people a sense of military oppression.

"What about the artillery training? They won't lose their composure after seeing those monsters, right?" Bai Yan was still a little worried. The soldiers of Black Iron Castle, whether they were the previous ones or the newly recruited ones, had never experienced actual combat against monsters.

"Don't worry, Your Highness. The cannon is really powerful. I think if it hits those monsters, even if they don't die, they will be crippled.

What's more, we have 300 cannons, plus the city walls, so those guys can't pose any threat to Black Iron Castle unless they can fly."

Gray clenched his fist in front of his chest and made a solemn promise to Bai Yan.

"Don't worry, this monster is just for us to practice with. Even if we can't resist it, I have a backup plan."

Bai Yan said this and glanced to his side. That greedy guy wasn't eating for free either.

"The day after tomorrow, I will hold a military parade in the square. It is time to let my subjects see whether our army has the power to protect them."

Bai Yan said, looking at the square formations. This was just the beginning.

The people of Black Iron Castle already knew that His Highness Bai Yan was planning to resist the monsters, and everyone had different opinions on this.

Some people said that Bai Yan was too arrogant and that the ordinary army of Black Iron Castle could not resist the monsters.

Some people also believe that Bai Yan has invited a team composed of high-level mages and high-level knights from the royal capital, which is more than enough to resist the monsters.

But no matter what, everyone is full of expectations.

They are looking forward to living on the ground this winter and working on the fields. After all, the land is theirs and there is no money to be made by hiding underground.

The lord of Dawn Fortress, Count Sebastian, also received the news.

Sebastian, a man with short brown hair, a tall stature, and limbs as thick as barrels, sat on a high seat in the meeting hall of the Dawn Fortress Castle, his eagle-like eyes slightly lowered.

On both sides of him, there were seven knights in armor sitting around a long table. The atmosphere in the entire meeting hall was a bit strange.

"Does anyone know why he has the courage to continue staying in the Black Iron Castle?" Sebastian said this slowly, then slammed the stone table hard with his thick arm.

"Black Iron Castle will never be able to resist the monsters. I guess he will learn from those low-lifes and hide in the cellar." The first knight on the left snorted coldly, his voice a little disdainful.

"But no matter what, he still didn't come, which made us lose the opportunity to kill him without any effort. Although it is just a Black Iron Castle, it also has its own army, doesn't it?" This time it was the third knight on the right who spoke.

"So what if we send troops? As long as we kill Bai Yan, the eldest prince's reward can fully make up for our losses. He is the future king, so I agree to send troops." The third knight on the left smiled, his voice as soft as a poisonous snake.

"Seconded!"

"Seconded!"

. . .

The remaining knights seconded the motion.

After hearing this, Sebastian nodded: "Then wait for the monsters to attack and then send troops to attack Black Iron Castle. No matter what, Bai Yan must die!"