Before arriving, she had made a lot of assumptions, imagining what Jiangcheng would look like, what the style of the buildings would be after the disaster, what the layout of the city would be, and what the human beings living in it would be like.

Radiant Wasteland Wind? Terminator Mechanic? Or biochemical peek-a-boo? Or a mad Max-like storm?

She never expected that Jiangcheng would be a building!

That's right, Jiangcheng is just a building!

But it was so tall and thick that Alpha Ji looked up at the sky 89 degrees to barely see the city, or the building, in its entirety.

How high is Jiangcheng?

Before the disaster, the tallest building in the world was called the Burj Khalifa, with a height of 828 meters, and less than 700 meters without hairstyles. Jiangcheng may not be as tall as the Burj Khalifa, but it is definitely three or four hundred meters tall skyscraper.

After the natural disaster, the plants are generally tall, and the trees in the forest are often ten or twenty meters in diameter, and the height reaches one hundred or ten meters or even 200 meters, but they have no advantage in front of this building.

How thick is Jiangcheng?

The average skyscraper is more modern, slim, and taller than wide; Jiangcheng is more ancient, or more specifically, compared to the Tang Dynasty, the width is significantly higher than the height.

The height is three or four hundred meters, and the diameter is seven or eight hundred meters, but it is not straight up and down, just like the trapezoidal pyramids of South America, from bottom to top, gradually narrowing, a total of three, four or five layers......

The specific number of floors cannot be counted from the ground, because it is really too tall, and the narrowing of the upper floors has arcs, and the view will be blocked, as if the fat man cannot see the surface of his feet.

Only the positions of the second and third roofs can be seen, and the muzzles of the rare cannons are poking out.

Although it is far away, it can also be felt that the people of Jiangcheng know the truth that caliber is justice.

The whole Jiangcheng is like a huge circular stadium, and on the top of the stadium, a slightly smaller stadium is placed, and then the third and fourth ...... It's like an unsinkable aircraft carrier built on land.

In comparison, the pyramid, which has been awesome for thousands of years, is a minor, and he can just hit Jiang Cheng's waist when he jumps; The Great Wall of China, which is also thousands of miles away, is dwarfed by it, and it is estimated that it will have to be coiled up thousands of kilometers to form the scale in front of you.

After all, this is a modern building based on a reinforced concrete structure.

But it's normal to think about it, because according to what Ye Chao said, there are more than 100,000 or 200,000 people in Jiangcheng, and there is no such a large scale, how can it accommodate the normal production, work and life of so many people?

"Boom ......" A sudden earth-shattering tremor came, and the distance was very close. Even the students in the basket were woken up and got up one by one with sleepy eyes.

Cannons are being fired at the head of the city? Enemies? Alpha Ji was instantly alert.

But the people who were awake in the dog team, including Xu Tiange, were all calm and did not give the slightest reaction, as if they were accustomed to it, and it seemed that they had entered the time of the salty......

"What's the situation?" Alpha Ji looked at Ye Chao's dog head.

Ye Chao was still in a daze and felt the building he was carrying, and he was asked a few times before he suddenly came back to his senses, and the dog listened to it: "Oh, that's rolling." ”

Billowing? Alpha Ji noticed that the place where the sound came out was a bamboo forest, that is, the bamboo was a little thick and a little tall, and it seemed that the color was a little whitish because of the lack of sunlight.

=￣ω￣=

Is it the kind of roll I want? Alpha Ji throws out a national treasure that rolls around and sells cuteness.

Ye Chao glanced at the GIF suspiciously: "...... Right? ”

"Ye Chao, take the palace to see!"

"Take you to see it? What's so good about rolling? ”

What's there to see about rolling on?!

Thirty years ago, I didn't dare to say that people all over the earth would come to beat you, at least half of them would be impulsive, do you believe it?

[Opinion -44]

The palace knocked, and accidentally the favorability dropped again.

[Opinion -10]

“……”

At the time of the stalemate, the long dog team had already carried the students, carrying the prey captured by the teachers all the way, the melons, fruits, insects and fungi collected all the way, and came to the gate of Jiangcheng, which was somewhat high-tech and somewhat retro.

Directly above the gate, the two 3000 inch + characters of "Jiangcheng" are subtle and low-key.

In front of the gate, the doorman wearing thick steel armor and holding an ultraviolet lamp stepped forward, greeted the teachers familiarly, and confirmed his identity at the same time, retrieved and collected materials, purified and filtered the body, and a set of processes down, and the city gate that had a fight with the enemy Hakka slowly opened.

When it comes to retro, it is because of the style that has not changed for thousands of years like the ancient city gate.

Speaking of high technology, it is because the gate has a strange metallic luster, not only the height of more than 30 meters, the width of more than 20 meters is comparable to beating the enemy Hakka, and the thickness is an astonishing one meter!

The volume of such a door is 300 cubic meters, and if the whole body is made of iron, the weight should be around 2,400 tons, and two doors are nearly 5,000 tons! Even if there is a door shaft, a slide rail, and a hydraulic device, how can it be so open and closed without deformation, without tension, and without wasting too much energy?

Even if it's hollow, it has to be hundreds of tons, right?

Alpha Ji can't ride her sister for a hundred years.

After paying the price of a favor, she got the answer - this door is a nano foam alloy, which looks tall and heavy, but in fact, 99% of it is cavity, sound insulation, air insulation and impact resistance, easy and clean and not greasy.

"I didn't go to school, don't lie to me all the time......" Alpha Ji smacked his lips.

High-strength metal foam does theoretically exist, after all, atoms and molecules are empty in the final analysis, and they can be arranged in an orderly manner completely supported by electromagnetic forces.

If metals are foamed at the nanoscale and neatly arranged according to specific rules, they will really give birth to all kinds of incredible mechanical and optical electrical physical properties, which is an area that many laboratories have been studying before the natural disaster.

The problem is, metal foam is so hard to make!

How is it possible to make all foam cavities the same size, the same specifications, and even the shape as specified? The parade has to be rehearsed for months!

Temperature, humidity and even a shiver in the magnetic field can have an impact on the finished product......

In fact, industrial-grade foam materials, the cavity can reach the millimeter level neatness, which is good.

One is 10 to the power of -3, and the other is to the power of 10 to the power of 9, feel it.

Not a square difference, of course, but —

===

=========

The gap between whether you can go to heaven or not!

"This ...... Is it hard? Ye Chao couldn't understand Alpha Ji's surprise, "Although I don't know the specific process, it's nothing more than activating the ability to foam it when the molten iron melts and comes out ......of the oven."

Alpha Ji appeared in front of his eyes, the molten iron came out of the furnace, and the red molten liquid turned into a boiling molten iron ball with the will of the operator, and the void was suspended and uncertain. There was a sudden "tom" sound, like popcorn, and the molten iron ball instantly expanded into foam alloy.

"You guys, do you know if you're cheating......"

Therefore, although it was a calm transaction, Ye Chao was still deducted from his favorability.

However, it was not Ye Chao who was anxious afterwards, but Alpha Ji herself.

It can't go on like this, it really can't! This guy's favorability has broken through -1500 and is heading straight for the -2000 mark

This palace must be reserved, and this palace must be less curious, otherwise disgust will turn into hatred sooner or later!

This kid doesn't care if he has no heart or lungs, and this palace can't care less......

Now I can still take a dog's head, in case of hatred, I can't even speak, I want to vomit when I hear his voice, but what can I do!

So, Alpha Ji tried her best to suppress her curiosity until five minutes later.

Five minutes later, she finally understood why Ye Chao said, "What's so good about rolling out......