"Whew-"

Xu Yi let out a long breath, put down the tool knife in his hand, and wiped the sweat on his face, but found that the hand felt very strange, and then looked at it, it turned out that his hands were full of oil stains, and he wiped it, I am afraid that the whole face has become a big cat.

Xu Yi didn't care about this at all, he smiled, and looked at the somewhat strange-looking iron bump erected in front of him with joy.

It is a bit inappropriate to say that it is an iron lump, this thing has a square base, and the upper part is a cut-out space, and the steel bars with large gaps are connected together, and three evenly distributed fan blades are wrapped in the middle.

Obviously, this is the fan he successfully developed.

It took Xu Yi half a month to develop this fan driven by the magic array.

Among them, the most important source of his time is not the most important power source, but the appearance of the fan.

After solving the main problem of the magic array replacing the motor, Xu Yi found a strict problem, the shell of this fan is difficult to imitate according to the model of those electric fans on the earth, because there is no perfect plastic and alloy process in this world.

In desperation, Xu Ye could only use iron tools instead.

And because the casting process in this world is far less elaborate than on the earth, the final table fan looks a little weird, and it can even be said to be very ugly.

"Anyway, the requirements can't be too high, just be usable. Xu Yi shrugged his shoulders and comforted himself.

After two more detailed inspections, Xu Yi picked up a magic crystal that was only the size of his thumb and had a bit of variegation, carefully placed it into the embedded opening behind the fan, and then sealed the entrance.

It was just a simple action, but Xu Yi sweated, and after wiping his face again, he raised his right hand with a solemn face, stretched out his index finger, hesitated for a moment, and then pressed it.

"Bang-"

With a crisp sound, the switch of the fan was pressed, and Xu Yi immediately felt a trace of magic inside the fan begin to flow, and after a while, the pale cyan light representing the activation of the magic array came out from the gap in the fan.

Xu Yi's eyes widened, staring nervously at the fan blade.

After a while, the three fan blades suddenly shook and began to rotate slowly at random.

At first, the fan blades rotated slowly, but it didn't take long for the speed to rotate faster and faster, and gradually, the three fan blades were completely indistinguishable from each other, and almost became one.

With the high-speed rotation of the fan blades, wisps of fresh breeze floated out of the fan and blew onto Xu Yi, who was sweating profusely, which immediately brought him a burst of refreshment.

Xu Yi enjoyed it silently for a while, and suddenly shook his fist hard.

It worked!

###

Seeing Xu Yi walking in with a fan, everyone in the research room cast curious glances at him.

What's wrong with this guy today? Don't say anything with a smirk, he still has such a weird-looking iron bump in his arms, what does he want to do?

"Hey, Xu...... Xu Yi, what is this?" Rem couldn't hold back the curiosity in his heart, and pointed to the fan in Xu Yi's arms and asked.

"This, it's ......" Xu Yi thought about it and found that it didn't seem to be suitable for calling this thing an electric fan. "It's a magic fan, I didn't have anything to do to make it. ”

"Magic fan?" The people around him were even more inexplicable.

Rem glanced at the fan, but he didn't feel any magic in it, and he was surprised.

"What is this thing for?"

Xu Yi smiled, looked left and right, and put the magic fan on the table in front of Rehm.

"It's not very hot these days, so I wanted to make this thing to cool everyone down. ”

After speaking, Xu Yi reached out and pressed the switch.

Everyone in the research room was a magician, so they naturally felt the flow of magic power when the magic array inside the magic fan was activated for the first time, but this magic flow was extremely weak, so it can be seen that the magic array in it must also be a very low-level magic array.

Immediately, everyone was amazed to find that the three stranger leaf-like things in this strange thing actually began to turn, and the speed was getting faster and faster.

"Wow! It's windy!" When Xu Yi put down the fan just now, he was facing Reim, and he naturally felt the wind blowing out of the fan for the first time, and suddenly shouted loudly in surprise. "It's so cool!"

"Wind?" The people around saw that the magic robe on Rehm's body began to swing, as if it was being blown by the wind, and they involuntarily came over.

As soon as they came to the front of the fan, everyone immediately felt the cool breeze.

It was still very hot today, and everyone was sweating a little, but now that the wind blows, they immediately feel cool all over.

After enjoying it for a while, everyone immediately asked Xu Yi.

"Hey, Xu Yi, how did this thing move? Is it because of the magic array inside?"

"Isn't that right? The magic array is okay, but how does the magic array make this thing spin? I haven't heard of a magic array that has this effect. ”

"That must have been researched by Xu Yi himself. Right, Xu Yi?"

"Do your own research? Xu Yi, are you so proficient in the magic array? You can actually research a new magic array by yourself?"

"That's right, Xu Yi, you can actually study the magic array by yourself, then why is your magic strength still so low?"

......

These people asked for a long time, but most of the questions revolved around Xu Yi's magic strength, but few people asked about the principle of this magic fan.

This is also in line with the tradition of the Sainz continent, where the application of magic is rarely cared for by magicians.

In the end, it was Wella, who had been looking at the magic fan and pondering, that asked.

"Xu Yi, there should be a magic crystal in this, right? Otherwise, the magic array would not have lasted so long. ”

"Yes. Xu Yi pressed the switch, stopped the rotation of the fan, opened the embedded port at the back, and took out the small piece of magic crystal, which had been significantly darker in color due to the consumption of mana.

Wei Na looked at the magic crystal in Xu Yi's hand, which was about the size of his thumb, and her eyes shrank suddenly.

"If I'm not mistaken, this magic crystal shouldn't even be intermediate, right?"

Xu Yi smiled bitterly and spread out his hand: "I don't have the money to buy high-grade magic crystals. ”

Wella nodded, took the magic crystal from Xu Yi's hand and looked at it, and then pointed to the magic fan.

"Xu Yi, can you disassemble this...... Magic fan, let me see the magic circle inside?"

Xu Yi shook his head with a smile: "It's okay to disassemble, but it's more troublesome to reinstall." Seeing the disappointed expression on Wei Na's face, Xu Yi said again: "But if you want to see the magic array, it's easy, I have the drawings here, and I can show them to you at any time." ”

"This ......" Wella hesitated for a moment, and suddenly as if she had made up her mind, she pointed to the magic fan and said, "How about selling me this magic fan?"

Everyone around was stunned.

Rem couldn't help but say, "Wella, what are you buying this for?" If you are interested in the magic array inside, didn't Xu Yi just say that he could show it to you at any time. ”

Wella shook her head: "It's different. Ignoring everyone's surprised eyes, he stared at Xu Yi and asked seriously, "Let's make a price." ”

Xu Yi looked at the serious expression on Wei Na's face, and felt a little difficult in his heart.

It seems that this Wella is really obsessed with magic, but when she sees such a novelty, she immediately wants to find out.

Speaking of pricing though......

If you only calculate the cost of materials, the main cost of this magic fan is concentrated in the structure, including the wooden base, frame steel bars, etc., and the total cost is less than thirty silver coins.

In addition, if you count the labor costs, including the cost of hiring a forger and others, the total cost will not exceed one gold coin.

But among these costs, the most important is actually the cost of research.

Xu Yi spent more than half a month in order to successfully develop a magic fan, in which almost every day of his leisure was devoted to it, and he used up more than a hundred pieces of paper just to research a completely suitable magic array.

Not to mention the transformation of the entire frame structure so that it can be perfectly integrated with the magic array, it is a fusion of mechanical technology knowledge on Earth far beyond the Sainz continent, and the value contained in this is incalculable.

Seeing that Xu Yi actually hesitated, Rem was suddenly unhappy, and frowned: "Hey, Xu Yi, this is just an iron frame, and it can be worth a few dollars? Since Weina wants to buy it, you can sell it to her, right? Just make a price, I'll come out." ”

Wella frowned and glanced at Rem, but didn't say anything more.

Although she was curious about the magic fan, she also didn't think that this weird-looking thing was worth a lot of money.

Who knew that Xu Yi thought for a while, stretched out two fingers and gestured: "For the sake of your colleagues, if you really want to buy it, two gold coins." ”

This pricing can be said that Xu Yi has completely abandoned the cost of research, and automatically treats this magic fan as a general commodity.

He wasn't worried that Wella would be able to study the mysteries of the magic fan as soon as she bought it, maybe she would be able to see through the magic array inside, but she couldn't see through the modern mechanical craftsmanship contained in this seemingly inconspicuous magic fan.

However, this price, which Xu Yi felt very conscientious in his heart, made everyone's eyes widen.

"Two gold coins?" Rem waved his arms exaggeratedly. "I said Xu Yi, are you crazy? This is just an iron lump! Although you can come up with this thing is very good, it is not worth two gold coins, right?"

The surrounding people echoed it, and they also felt that Xu Yi's pricing was too exaggerated.

Wella didn't speak, but her deep furrowed brow made her thoughts clear.

Xu Yi sighed, a little helpless.

People in this world don't know anything about modern industry, so they naturally don't understand the value of it.

From a purely mage's point of view, the magic array inside this magic fan is indeed not worth two gold coins.

As a senior mechanical engineer on the earth, Xu also has his own dignity, and he will never allow the things he has worked hard to research to be sold so cheaply.

So he could only shrug his shoulders: "Since I don't accept this price, forget it, anyway, I just think it's hot in the research room, so I brought it over for everyone to use." ”

Everyone looked at Xu Yi with a strange gaze, this guy, since he can let everyone use it for free, why not just be a favor and sell it to Weina at a low price?

Wei Na hesitated for a moment, and just wanted to continue to persuade Xu Yi, when a clear voice suddenly sounded at the door of the research room.

"Two gold coins, I bought. ”