Once night falls, monsters will come and go, but the huge city has energy protection, and the people in the city can still move freely at night, and there will be no curfew unless there are occasional accidents.

The city at night is very different from the scenery during the day.

It doesn't take too good eyesight to see all kinds of monsters flying in the night sky overhead, and their glowing eyes are like twinkling stars in the air, as long as they don't break through the defenses, this is also a sight.

Yang Yi didn't go out, when he looked up, everyone saw the same sky, he had already seen it on the street during the day, so naturally there was no need to look again.

A group of people in the backyard courtyard are busy in full swing, and a team of people is helping five blacksmiths build a stove.

"Master Pony, don't you want to rest?" Howe saw him coming and took the initiative to greet him.

"Where can I sleep with such a big movement?" Yang Yi smiled, and Huo Wei said embarrassedly: "It's me who owes it to consideration, and I will immediately ask someone to arrange another room for the colt and the princess." ”

Yang Yi did not refuse.

"These five are the best blacksmiths in the city?" Yang Yi asked.

"Yes. Absolutely, yes. ”

Yang Yi smiled and walked in front of them.

The youngest of the five was in his forties, and the eldest looked to be seventy or eighty years old, but because he had been hammering iron for a long time, the old man looked extremely strong, and he looked like a middle-aged man of fifty years old.

As a result of their long hours of work at the stove, the faces of the five blacksmiths were a little like polished pig iron.

This also shows that they do have a lot of experience.

"A few masters should have a lot of knowledge about metal materials, and we want to make a few things now, I think a few masters should be able to tell me what materials are more suitable, right?" Yang Yi "took out" a spring. "This thing needs to be repeatedly compressed and stretched to maintain a high degree of elasticity, I don't know if a few masters have any suitable materials to recommend?"

The five blacksmiths had already heard the identity of this person from the city lord before entering the city lord's mansion. Let them be sure not to offend people, so when facing Yang Yi, these five big and three rough men also thought quite respectfully.

One of the old men took the spring in Yang Yi's hand and looked at it. According to Yang Yi's description, he pressed the spring a few times, and after knowing its principle, he immediately rummaged through his years of experience in his mind to see if there was any metal that met his requirements.

The other blacksmith took the spring and looked at it, thinking the same thing.

Each of the five people looked at the past and used their own experience to imagine which metal would meet the requirements.

The youngest blacksmith took the spring and looked at it for a moment, then frowned.

"Master Horse, I don't know what this thing is mainly used for? We need to know exactly what it's used for before we can be more sure of the materials that are suitable for making it. "This is the most responsible word of an experienced blacksmith.

The others didn't know, but they didn't dare to say it.

Yang Yi stretched out his hand and conjured out four main parts, floating in front of them.

"It's a mechanical device where the spring can generate a tremendous force to exert a tremendous force on the bullet in front. The bullet in turn deals massive damage to the target. The performance of this intermediate spring is very critical, it must be able to withstand repeated compression and stretch to maintain the original strength, even if the strength changes, it should ensure that this change does not come too quickly, I will show you. ”

The syringe piston pumped, the spring compressed, the spring reset, and with a bang, the bullet flew out instantly.

The five blacksmiths were all cultivated people, and they were all shocked when they saw the bullets that flew out in an instant. It was so powerful, and the power generated in that moment could literally shoot through all five of them.

According to what the horse said, all this power comes from the spring!?

They were a little incomprehensible for a moment, but for a moment they realized what a great thing they were about to do.

Not a sword. Instead of sticks, what they're going to craft might be a paranormal weapon.

The sensitive young man was even vaguely aware that this weapon would bring unexpected changes to the border city.

Excited.

For a blacksmith who forged swords for a living. Every time I can forge an earth-shattering weapon from my own hands, it is something to be proud of.

"It takes so much force to withstand repeated stretching. We've never made such a material before, but please rest assured. With our familiarity with metal materials, the five of us will surely forge the most suitable material for making this thing. The youngest blacksmith said.

"Then it's up to you." Yang Yi nodded, still very confident in their experience.

At this time, he couldn't help but believe that he could easily control all the changes in the Divine Wood that he needed, but he didn't know anything about other materials, and even if he knew a little, it was only theoretical knowledge.

For example, it is not only the original natural properties that affect the strength of metal materials, but also the degree of calcination will also greatly affect their performance, which Yang Yi knows.

The problem is that the understanding of this kind of thing is only on paper, and it is really difficult for him to really grasp him clearly.

And these experienced blacksmiths can use their experience to accomplish this task perfectly.

As for the properties of the materials in the dark world, their understanding of them is definitely a thousand times stronger than that of Yang Yi, and what he can do is actually choose the best materials in the later tests.

That's right, it's up to them what kind of material to forge.

The five of them also seemed to realize that the burden on their shoulders was not light, and after watching Yang Yi's demonstration, the expressions on their faces changed, as if they had accepted a sacred task and intended to complete it with full concentration.

It may take a long time for one person to complete, but without one person together, then the efficiency is not as simple as five.

After all, the experience of five people put together is not as simple as accumulation.

In their minds, they were thinking about what kind of material was most suitable to make the thing that Master Pony demonstrated, which needed to generate such a huge amount of force and withstand repeated stretching, and such a metal material must not only have enough strength, but also strong enough toughness.

These properties were also required in forging swords, but they were not as demanding as they were now.

Perhaps, they will forge a completely new material.

The five of them were each thinking about what metal material to use to forge the springs better, while building the furnace as fast as they could.

They are also looking forward to what kind of weapons they will build.

Perhaps, it is the most shocking and powerful weapon created by the efforts of five people.

Looking at their vaguely excited eyes, Yang Yi had a smile on his face.

The passion for powerful weapons is probably unique to the dark world, a world that is born to use force to survive, right?

But it is precisely because of their almost fanatical enthusiasm that they can compete with those huge demon beasts in this dangerous world, otherwise as long as they are a little softer, a large group of demon beasts will never turn over.

Even the dark world became the world of demon beasts early, and the people here disappeared into the belly of demon beasts early.

Yang Yi still doesn't know exactly when the demon beasts in this world appeared, but it is conceivable that in the long history, the people of the dark world must have tenacity and perseverance beyond ordinary people.

Otherwise, history will be like a monster that will devour them mercilessly.

In this way, it is difficult for them not to be tempted to see a powerful weapon.

Yang Yi was also very interested in what kind of materials they would make, and he couldn't sleep anyway, so he simply asked people to move a chair and sit in the courtyard to watch how they did it.

The furnace was built by five blacksmiths, and a team of men and horses built according to their requirements, in the shape of a two-meter-and-a-half high circular tower, with five openings underneath, each of which was just enough to accommodate one person to work.

It seems that they intend to go on together.

The stove was not used immediately after it was built, but a small fire was lit inside the stove, and a very thick layer of black mud was applied to the outside of the roadside as the walls of the stove were heated.

Huo Wei told Yang Yi that this mud has a very good thermal insulation effect.

That's understandable.

The purpose of the low fire in the furnace is to allow the moisture in the mud to disappear quickly, so that the mud can harden and agglomerate in the shortest possible time.

This work has to be done very quickly, otherwise one side has already dried and the other side has just been painted, which will not form a perfect integrated layer and will be prone to cracking.

The five blacksmiths themselves did the work, and the five men stood on the five furnace mouths, and the movements were very fast, the walls of the furnace had just been warmed, and they had already coated the entire furnace with a uniform layer of black mud.

After a while, white smoke rose from the entire furnace, and the moisture in the mud was slowly evaporated along with the moisture from the filling at the joints of the Leijian stove.

When the black mud is completely dry, the furnace is officially finished.

However, it does not look black on the surface as it just sees, but is off-white.

While the temperature of the furnace wall had not yet cooled down, the five master blacksmiths quickly added roasted rice to the stove and began to heat the stove completely.

There are two layers of firewood in the stove, and different firewood is placed on the two layers, and the bottom layer is placed with an off-white firewood that Yang Yi has never seen, yes, it is firewood, and Yang Yi can even see the traces of wood chopping.

On top of it is a grayish-brown wood.

The blacksmith lit the wood on the upper layer with oil.

Yang Yi was curious about the wood of the dark world, both in strength and burn resistance, much stronger than the firewood on the earth under his influence, and the ability of gray-brown wood to burn in a furnace was like high-performance coal. (To be continued......)