The repayment of kindness from Bai Jiahei gave Zhu Zilong a strange map.

However, it seems that there is nothing much discovery other than that. Because the resonance of the broken pieces of the celestial dragon sacred clothes in the dragon ball disappeared.

There is too little information that Zhu Zilong can't draw any conclusions from this.

However, he was not stupid either. He knew that he couldn't figure it out now, so he saved it first.

After putting the picture away from the Dragon Ball space, he took Bai Jiahei and returned to the island villa. He told the maid and his family that this was a pet he wanted to adopt, and then settled Bai Jiahei and settled Bai Jiahei on the island.

Considering that he can stay in modern times, it doubled.

So he decided to take Plan D and inspect it in advance.

The so-called D plan refers to the plan to invest or acquire products related to 3D printing in one's own name, and then transfer large amounts of them to the Ming Dynasty.

3D printing (3DP) is a type of rapid molding technology. It is a technology that uses adhesive materials such as powder metal or plastic to construct objects through layer-by-layer printing based on digital model files.

It is used to manufacture models in the fields of mold manufacturing, industrial design, etc., and then gradually used to direct manufacturing of some products.

The sci-fi blockbuster "Jurassic Park 3" that was hit in 2001 brought "3D printing technology" to the screen for the first time. It was first invented by American inventor Charles Hull.

If you want to ask, why did Zhu Zilong focus on three-D printing?

It is actually very simple, because the three-D printer can print almost any product. It is called omnipotent!

Of course, this is an exaggerated description, but its function is indeed extremely powerful.

For example: in the passenger plane, more than 1,000 parts are all made using 3D printing technology.

You can also print home appliances and even print out food. Even the house can be printed out!

For example, on September 22, 2016, someone used it to build a villa. The entire process of building a house is controlled by a computer program. According to the design drawing, high-density and high-performance concrete are sprayed out with a 3D printer nozzle, walls and compartments are printed out layer by layer, decoration, etc., and then the basic structure of the entire house is completed with a robot arm.

The cost per square meter of a villa is 3,000-4,000 yuan. By now in 2023, it is possible that the cost per square meter is 2,000 yuan per square meter.

Of course, you can print out the gun directly (this is what Zhu Zilong cares about the most)!

In Western countries such as Europe and the United States, different from the special circumstances in China, the 3D technology has already shown a blowout growth.

3D printing is scientifically called "Added Manufacturing", which is exactly the opposite of "subtractive Manufacturing". It is not a temporary new technology. In fact, it has been silently dedicated to the field of industrial manufacturing for nearly 30 years. It is a type of rapid prototyping technology and is known as the core technology of the "third industrial revolution".

3D printing manufacturing technology has completely changed. The methods and principles of the traditional manufacturing industry are a subversion of the traditional manufacturing model.

As early as 2018, a shocking 2.3 million units were sold. After 4 years, the sales volume of the entire 3D printer is equivalent to a 1,000% increase.

At this moment, in one of the largest company in Greece.

Zhu Zilong was observing how the several high-end three-D printers in front of him shot out all kinds of things, including guns.

"I remembered that in 2015, I heard from the Internet that I could print out guns directly, but it was not possible in China. At that time, it seemed like it would take several hours to print out a gun. I didn't expect that it would take only half an hour to print out a three-D gun!" Zhu Zilong was very surprised to see it.

The world's first 3D-printed gun was founded by DefenseDistr. 25-year-old Texas student Cody Wilson was built in 2012.

That three-D pistol can use standard pistol magazines and support bullets of different calibers.

Immediately afterwards, just the second year, foreigners used a three-D printer to print out the world's first three-D rifle. Like the AK-47, they are fired through gas!

However, this rifle, called "The Grizzly 2.0", cracks appeared after 140 test shots.

Compared with modern metal guns, the number of shots of 140 was still slightly fragile. But at that time, this was already quite good for a rifle made of plastic.

In 2014, SolidConcepts, the United States, manufactured the world's first 3D printed metal pistol. It successfully fired more than 500 bullets. This achievement is obviously much better than the previous 3D plastic pistol. (Real story!)

Then in 2018, even machine guns and submachine guns could be printed using three-D printers. And the performance has been improved!

And now in 2023, haha.

Let's put it this way, as long as you have a computer and a 3D printer, click to print, and then walk away, just have materials and you can make a semi-automatic gun out in half an hour.

It may not be as good as real metal guns and military guns, but it is much stronger than hunting rifles, earth guns, modified guns, and Ming Dynasty firearm guns.

This situation is impossible in China, but it is completely easy to do in countries where the people can hold guns in the West.

This is also something Zhu Zilong also valued when investing in Greece.

People who have never been to Western countries always think it is easy to buy guns here, but in fact, it is not too easy to strictly count.

There are many procedures for individuals to buy guns, and they often review them. If you accidentally cancel your gun license. Just like what you think of as arms buying cabbage, you can buy a large number of guns and leave.

Really, it's not what you thought.

Especially for Zhu Zilong, who wants to keep a low profile, maintain a sense of mystery and security, it is even more difficult, and having money is not necessarily easy to deal with.

So he focused on the three-D printing technology that could hide the truth.

There are many such things here, and they can even be called the people's livelihood industry. It is not as troublesome as buying a gun!

Therefore, Zhu Zilong wanted to buy a batch of high-end three-D printers and then use diesel or human power generators and various generators. In the military restricted areas of the Ming Dynasty, a fixed program was used to start the printer, and a three-D gun was produced twenty-four hours a day.

Imagine if there were a hundred or hundreds of such printers working together.

One hundred or hundreds of three-D guns are produced in batches in half an hour or an hour. How many are there in a day?

Haha, as long as the raw materials are supplied, in a few days, you can mass-produce thousands or tens of thousands of guns in a minute, and the three-D modern guns will be released.

Even if the weapons of a hundred thousand troops are updated, it will only take one month to print, one month to prepare, and one month to transport raw materials. Three or four months will be enough!

It's terrible to think about it carefully!

Moreover, gun technology and model can be updated and upgraded at any time.

With this magical object, Zhu Zilong can simply sweep across the entire Ming Dynasty time and space.

Well, of course, I have to talk about the shortcomings of the Three D gun.

There are also, for example.

First, the 3D gun is not a regular modern gun after all. If the effective attack distance of a regular pistol is more than 200 meters, then the 3D gun can only hit more than 100 meters at most.

Second, due to material reasons, its probability of blowing up is greater than that of modern regular guns, and its service life is shorter, and it needs to be replaced frequently.

Third, the raw materials requirements are a little higher, but for the Ming Dynasty, it is a little higher, so Zhu Zilong has to pull the raw materials from modern times.

Therefore, if you want to cheat on a large scale, it will definitely take more time than three months. In addition, you often need to replace the old gun with a new gun, which is also troublesome!

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Chapter completed!