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Zhang Yuntian's face was full of black lines, "What does a building scanning device do?" Please explain! ”

Seeing that Zhang Yuntian agreed to allow it, the old man lifted the storage box down, there was a box the size of a mobile phone inside, and the remaining space was filled with diamond-shaped crystals the size of fingernails, and he said with a smile: "This device is used to scan the building complex, for example, the medical school near here, as long as these water crystals are dispersed, they will resonate with the magnetic field of the medical school complex, so as to obtain the number of buildings, and can transmit them to the imaging device to automatically generate holographic drawings!" ”

As he spoke, he opened the device and threw a water crystal upward, the water crystal seemed to be alive, spun in the air for a while, and then emitted a light green light to scan around, and then, a mini interior landscape appeared above the device, and the proportions and interiors inside were exactly the same as the whole room.

"How? This device is a perfect match with the restoration equipment, very suitable for people who go out, some people are prone to insomnia in an unfamiliar environment, wake up, as long as the home environment is scanned, projected into the hotel where they live, there will naturally be a feeling of home..."

The old man looked at Zhang Yuntian with a sneer, and when he saw the latter's unconvinced expression, he hurriedly added: "Of course, in ancient times, many troops would use this method to record the battlefield environment in advance, and then re-project it to train soldiers to be familiar with the environment, so as to better engage in battle!" ”

Zhang Yuntian nodded, how many of the technologies in the ancient war period were used to improve people's lives? Besides, even if you don't adapt to the living environment, can you treat insomnia just by changing your appearance? At the very least, you have to change the sheets and bedding!

He picked up a piece of cold hydrocrystal, looked at it carefully, in the center of the crystal, there was a chip the size of a fly's head, probably this is the scanner, the lens only plays the role of refraction and amplification, Zhang Yuntian nodded with satisfaction, "How much does this device contribute?" ”

When the old man saw that it was going to open today, he was so happy that he couldn't close his mouth, "It's not expensive, it's not expensive, it's only 1,500 contributions!" If you buy the restoration device together, I can give a 20% discount on the total price, a total of 4,000 contributions! ”

These two devices are really matching, if there is only a restoration device and no scanning equipment, there is nothing new with those few drawings; If you only have scanning equipment, it's even more chicken, you can't project it after scanning, what are you buying it for?

Therefore, Zhang Yuntian deeply suspected that this was originally a set of equipment, and it was sold by the old man as two things.

Zhang Yuntian paid the money and was about to leave, when a voice suddenly came from the door:

"Hello boss, I'm a college student studying weather control, please take a look at my invention!"

It turned out that the boy I saw ten minutes ago had already walked around the shop, and judging from his sales efficiency, he was all turned away without exception.

"Oops, why are you here again? How many times have I said that my store sells construction-related equipment, and it doesn't match your weather at all, even if it is placed here with me, no one will buy it, you go to the next one to have a look! ”

The old man's face was full of helplessness, and from his words, he could tell that the boy had been here more than once.

"What's in your hand?"

Zhang Yuntian asked.

"This is an artificial rain cannon that I invented, and as long as this crystal is loaded into it, artificial rain can be realized."

Despite all the blows, the boy still had faith in his invention.

"Artificial rain? This thing was invented by someone in ancient times, and it's not a new thing, your invention is just a little more sophisticated! ”

Zhang Yuntian was slightly disappointed, if it was just this kind of Cheng dù thing, it would indeed be difficult to be accepted by the store.

"Yes, yes, not to mention that there are tens of thousands of desalination ponds in the Federation, and there is no need to worry about irrigation and daily water at all, what is the use of asking you for this thing? In case you bring down the drifting radioactive dust again, who dares to bear this responsibility, I advise you to invent something practical! ”

The old man persuaded bitterly.

"No, you don't understand the real purpose of my invention, let's correct it first, the premise of the ancient invention of artificial rain is that there must be a certain cloud layer as the foundation, and then shoot dry ice into the sky to promote rain or increase rain, and my invention can produce rain even on a cloudless sunny day!"

The boy explained with a serious face, "The significance of my invention is not only rain, these crystals are optional, after my improvement, you can make anything in the world, such as flower petal rain, colorful rain, can also rain tricky blood, etc..."

"Hey, what a child's invention, what's the point of this thing? People spend money to buy things, in order to improve their living standards, you have such a thing as nothing but fun, and parents do not dare to let children play with such dangerous things, in case the barrel is not to the sky, but to the building, the consequences must be unimaginable... Tsk tsk, young people nowadays really like to invent things for granted..."

The old man is probably very nagging himself, and he pours cold water one after another, without stopping.

Zhang Yuntian thought for a while, and suddenly asked, "If I want the rain to contain... Belch... Healthy mushrooms, is this possible? ”

He originally wanted to talk about fungi, but he was afraid that he would be mistaken for a terrorist, so he deliberately changed his words to say that they were healthy fungi.

"Absolutely!"

There was a flash of hope in the boy's eyes, he had been selling for so long, and there were many people who poured cold water, but Zhang Yuntian was still the first one to really ask about the invention function, which made his somewhat extinguished fighting spirit rekindle a little.

"Just put a concentrated liquid in the inside of these additional crystals, and when it rains, it will pour down with the rain, for example, the petal rain I just talked about, which is actually a fungus, and they will produce a pale pink petal-sized cap in the right temperature water, which looks like a flower petal!"

Zhang Yuntian nodded, this is what he is really looking for, "How much is a set?" How many sets do you have? ”

"That's what I've done, but there's a lot more to it and if you need it, I'm always ready to make it! If you really want to buy it, I'll sell you 500 contributions, what do you think? ”

Saying that, the boy looked at Zhang Yuntian worriedly, in fact, this invention does not mention how much brain power and energy it spent, the cost of raw materials alone has four hundred contributions, originally he wanted the price of one thousand, but after many consecutive days of blows, he no longer had any hope, as long as someone buys it, even if he contributes three hundred, he is willing to sell, it is better than losing all his money.

"Okay, deal, I'll order another fifty sets, and what kind of crystals of yours, the more the better!"