Walking more than 1,000 meters further, you can see a large number of buildings, the figures are panicked, the fire is bright, the sound of "kicking and clanging" is deafening, and hundreds of people are busy here.

In front of me, there is a large square, which is filled with all kinds of strange instruments.

The outer structure of the wood, the core of metal gears and springs, there are siege vehicles, catapults, giant bows and crossbows, a few of which can be named, and most of them are incomprehensible.

Especially an object similar to a glider, Li Wenhao was stunned, and almost thought that he had met a fellow countryman...!

"Gu Yazi, come and see General Zhengxi!"

Cooper ran into a group of people and dragged a fat old man out: "General, this is Master Gu Yazi!"

"Li Wenhao has seen the master!"

Li Wenhao cleaned up his mood and arched his hand to Gu Yazi, this old man is not simple, he is definitely an academician on the earth.

Gu Yazi looked like he was in his early sixties, his face was red, maybe it was because he was often close to the stove, his skin was dark, and in general, he was a fat old man with a burly figure.

"You are Li Wenhao who liberated the slaves, very good, young man, you are good!"

When Gu Yazi saw Li Wenhao, the dissatisfaction on his face disappeared, and he returned the salute very seriously.

"Thank you, General, restore my free body, unlike some people, who say it nicely, but don't do anything!"

"Gu Yazi, when have I ever treated you badly!"

Cooper immediately jumped to his feet, he usually doesn't give face, but today he embarrassed him in front of the general, it's really hateful!

"That fierce woman, didn't you send her to bully me!" Gu Yazi seemed to be more angry than Cooper, waving his fists as if he was going to beat someone.

"Murderous woman?"

Li Wenhao was a little unhappy, how could a master-level national treasure still let a woman bully, glared and reprimanded Cooper: "What kind of fierce woman, dare to be disrespectful to the master, and be executed immediately!"

"The old minister will do it!"

"Wait!"

Unexpectedly, Cooper agreed very happily, but it was Gu Yazi who objected, and his expression was still very anxious: "General, there is no need to be executed, or let me be my wife!"

"Be a wife!"

Okay, now it's Li Wenhao's turn to be confused, what kind of god operation is this, he gritted his teeth with hatred before, how could he be a wife when he turned a corner.

"Which, I've been bullied for a long time, I always have to be bullied back!" Gu Yazi blushed, an old man in his sixties, who actually saw shyness.

I'll go, I'm afraid this old man doesn't have masochistic tendencies!

"Hey, you can't be a good person these days!" Cooper sighed, looking like he had been wronged, and he didn't seem surprised at all by Gu Yazi's change.

"Master Gu Yazi, in addition to appointing you as our army, the chief craftsman master on this trip.

There is another important matter, our army will set off tomorrow afternoon at the latest to attack the city of Langya Wang, I don't know if you have any ready-made siege equipment here. ”

Time was pressing, and after getting to know each other, Li Wenhao immediately entered the topic.

"Tomorrow afternoon?"

Gu Yazi shook his head when he heard this: "There is only one battering ram and a few trebuchets available, and only one day is too little."

I've been to Wangcheng, and that's not enough!

Otherwise, I will take these apprentices of mine and go with the army tomorrow, and the general will recruit some more craftsmen, and as long as the materials are sufficient, within two or three days, I will be able to build twenty trebuchets and hundreds of ladders to climb the city!"

"That's okay!" Li Wenhao frowned and thought for a while, although it was a little dangerous to let Gu Yazi accompany him, but at present, this suggestion was the most feasible.

After all, no one knows what will happen to this Langya King City if it will be attacked for a few days.

Gu Yazi is with the army, and he can adjust the type of equipment at any time according to the actual situation on the spot, so as not to delay the military situation.

"Since the general has agreed, the old man will go and prepare, build some more metal movements, and install the external structure to use it when the time comes. ”

"Wait a minute!" Li Wenhao stopped Gu Yazi, who was leaving, and took out a drawing from his arms.

"Master Gu, show me, this is a fire ** I drew, I don't know if I can create a few doors overnight!"

This is the world of cultivators, and most of the craftsmen are cultivators, so it is not difficult to build a cannon with a simple structure.

"You're a blackiron cannon?"

Gu Yazi only glanced at it, then shook his head, and denied it repeatedly: "General, a Xuantie cannon requires two thousand catties of Xuantie, as well as precious metals such as Xuanyin and Xuanjin, and the cost is close to 100,000 taels of gold, which is too expensive!"

When used, it also requires a lot of qi practitioners to replenish the spiritual power of the cannon, which is suitable for naval warfare, not for land battlefields. ”

"Master Gu, take a good look at it, my cannon is only five hundred catties, and it doesn't need the precious materials of Xuanjin, and it doesn't use spiritual power, it uses gunpowder!" Li Wenhao patiently explained.

"Gunpowder, no, gunpowder is not good, gunpowder is too weak!" Gu Yazi heard the gunpowder, his head shook even more happily, and he was doing experiments on the spot, and when he stretched out his left hand, a handful of black gunpowder appeared in his palm.

The spiritual power ignited, and there was a muffled sound of "bang," just like the burning of a match, and there was no power at all.

"General, the power of gunpowder is indeed too small!" Cooper said as he spoke.

"The gunpowder I'm talking about is not the usual gunpowder, but this!" Li Wenhao saw that the explanation was not clear, so he simply took out a small package of solid powerful explosives produced by the system.

The power of gunpowder in this world is very small, and he asked the system, the reason is that it is affected by spiritual power, not only living things, but all substances have undergone some changes.

The formula of gunpowder remains the same, but it is much less powerful and almost useless.

The powerful explosives produced by the system are slightly different in terms of recipes and materials.

What is it, the system let him explore it by himself, no, Li Wenhao thought of Gu Yazi.

It would be even better if you could crack the recipe of the system explosives!

"It's gunpowder!"

Gu Yazi was very surprised, broke off a piece with his hand, put it under his nose and smelled it, and nodded: "There is indeed the smell of gunpowder, and there are spiritual power fluctuations in it." ”

"Master Gu, I also got this gunpowder by accident, can you tell its ingredients?" Li Wenhao asked in a nervous whisper.

"I'm sure there's fire powder in it, and the rest is unclear, and some experiments are needed to judge!"

The master deserves to be a master, and Gu Yazi just sniffed it with his nose and determined a material.

Li Wenhao was just about to praise, but his face suddenly changed, and a spiritual light shot out in his hand: "Don't light the fire, throw it away!"

"Boom. "It's a pity that there is no hurry, Gu Yazi and Cooper have been blown up into the sky.

"Damn!" Li Wenhao's anxious head was sweating, and he chased after Gu Yazi in a flash.

Gu Yazi is only a quasi-third-order, if there is an accident at this time, it will be a tragedy.

As for Cooper, he didn't even bother to look at it, the quasi-fourth-order skin was thick!