"Look at your unproductive appearance!" Li Yunfei scolded with a smile and threw Kao a few drawings casually.

Like a vicious dog pounced, Kao grabbed the drawing, smiled at Li Yunfei, and immediately began to look eagerly.

Before coming to eat in the highlands, Li Yunfei gave him a stack of drawings, which he had never seen before, and he had been studying frantically for almost a few days and nights.

When he figured out what Li Yunfei meant, he almost went crazy with excitement, so now he is sparing no effort in the construction of the test site.

For this research maniac, nothing excites him more than new technology. Moreover, in Li Yunfei's drawings, he also found some imperfect places and put forward his own suggestions for improvement, which were accepted by Li Yunfei.

At this time, looking at the few sketches in his hand, Kao couldn't help but show a puzzled look.

These sketches depict a simple sling device, and an iron-hulled sealed boat, which is only about two meters in diameter and three meters long, so to speak, very small, and some hooks at the top, which I don't know what to use at all. Moreover, the front end of this sealed ship seems to be equipped with the wind magic circle used on the wind wheel.

"My lord, what is this?" Kao asked, looking up at Li Yunfei.

"This is the transportation device used in the underground dark river, and the dark river below the dining heights leads directly to the Flame Township, and with this device, it can go directly to the Flame Township through the underground dark river. Li Yunfei said with a raised corner of his mouth.

Although he could go to Flame Township in a straight line with that dark river, he couldn't run back and forth every day, and after installing this cableway-like device, he could directly transport the ore from Flame Township through the secret passage of the Dark River. And the warriors of Falling Snow City can also go to the Flame Country through this secret passage, so that they are unaware.

Kao instantly understood what Li Yunfei meant, and couldn't help but praise it repeatedly.

"Alright, don't stop working, go and arrange for someone to make all these things. Li Yunfei said with a smile.

Kao immediately nodded yes and turned to arrange for manpower.

"Patriarch Pol, I'll leave this to all of us from the Firehammer Clan. Li Yunfei turned his head and said. The technical content of this Dark River Cableway is not too high, so the people of the Fire Hammer Clan are enough to do it.

"God reassures us!" said Old Pol, clapping his chest with a bang.

Li Yunfei nodded and began to assign tasks.

At this time, the entire Falling Snow City was completely a huge construction site, full of warriors who were carrying out various constructions.

Whether it was the warriors from the Wilderness Wanderer tribe or the elite of the city defense army in Roland Megacity, there was no complaint. Either way, it's much easier to build a house than to fight a giant.

And those magic gold soldiers and soldiers of the Iron Guard who are descendants of Li Yunfei are responsible for the construction of the test site at this time.

Li Yunfei personally led the first batch of students of the War College to build huge factories in the open space in the east of Falling Snow City.

The frames of these factories are extremely large, all of them are level with the fifty-meter walls of Falling Snow City, and they look like small castles.

It's just that except for Li Yunfei and a few people, no one knows what these factories are for.

With the assistance of magicians and various magic scroll alchemy equipment, dozens of factories were quickly built, and then all of these factories were built with blast furnaces, huge iron frames, and so on.

Once all of this was built, the factory was immediately off-limits, and no one was allowed to enter except for a few craftsmen who had permission to do so. And the people who entered it could not have left without Li Yunfei's permission.

Although it was unknown why the Dean had made such a decision, the 1,000 Demon Gold Warriors who were the guards were still loyal to their duties, surrounding the factory like iron buckets.

Over the next few days, loud clanging noises began to be heard in the factories, and there was a roar like the roar of a wild animal.

Puffs of smoke rose from the huge chimney at the top of the factory and dissipated into the sky, but no one knew what was going on inside.

Li Yunfei plunged headlong into this factory and never came out again.

Fortunately, he had already arranged all the affairs outside, and the walls of Falling Snow City continued to be built and reinforced, and under the leadership of Luke and Martin, the soldiers of the expeditionary force continued to drill and conduct defense exercises.

After the initial nervousness, the soldiers of these expeditionary forces have fully adapted to the current situation, no longer feel the slightest nervousness, and have even been looking forward to the early appearance of the giant so that they can go into battle.

Time passed, and Falling Snow City had begun to take shape, turning into a complete military fortress.

The night of the ninth day became extraordinarily long, and after the night covered the earth, it was like a black veil, which changed from light to thick and from thick to light, and faded layer by layer.

Montto stood on top of the city wall, looked at the fading night, and then turned his head to look at the factory building in the east of the city, and couldn't help but show a trace of anxiety.

Li Yunfei still hasn't come out of the factory, and according to what the Lionheart Emperor said, today is the day when the giants will attack the city!

The giant has not moved for so many days, and I hope this time it was just a misjudgment by Lionheart...... Montor thought to himself as he looked at the wilderness in front of him. At this time, a layer of white mist rose in the wilderness, enveloping the entire wilderness, and it looked like a fairyland.

The rising sun had already appeared in the sky, but it was blocked by the fog, and there was only a faint halo of light, and it was impossible to see the appearance.

And as the sun rises, the fog in the wilderness quickly dissipates.

Phew, just like the other day, the giants shouldn't be coming, right?" Most of the warriors defending the city had this thought in their hearts, and they breathed a sigh of relief.

Just at this moment, a slight vibration suddenly came from a distance, and the city wall that drove Falling Snow City also began to shake slightly, shaking the sand particles on the city wall and jumping out of the cracks in the wall.

"Boom...... Rumble...... Rumble...... Boom ......"

The vibration became stronger and stronger, and at the same time, a heavy sound was heard, and the warriors, who were already vigilant, immediately turned solemn, and all straightened their bodies and entered the battle state.

They were all too familiar with this dull sound, or rather, every human living in Black Iron Commander had been familiar with it since childhood, and it often appeared in nightmares.

The footsteps of giants!

In the next second, the rough rock body of a giant smashed through the dense fog and appeared in the sight of the soldiers of Falling Snow City.

It was a tall rock giant, and the surface of the rock that made up its body was covered with ravines that looked like knives and axes, and patches of moss grew on it, adding to the ugliness and hideousness.

Immediately after that, there is the second head, and then the third head......

Giants emerge from the mist, like monsters of myth and legend.

They had already smelled the scent of humans, and they were on this familiar plateau, above this table, so many of the giants let out a low roar of excitement.

A delicious feast awaits them!

In the blink of an eye, the giant at the front had come to a place less than a hundred meters away from Falling Snow City.

Montor snorted coldly, waved his hand, and released a fireball, which instantly shot straight into the sky, exploded in midair, and turned into a cloud of sparks.

This spark is the signal to attack!

In the next instant, the ten magic guide cannons that had been waiting for a long time radiated brilliant light at the same time, bombarding the giant crowd of people!