The villain also has spring

Thanks to Hell ∞ Detective, Shadow of Yan and Lin Han for their monthly tickets.

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Although the dam is very long, it can't accommodate many people.

With doubts, the white swan took off again and turned to the fifth settlement.

What is most important to human civilization: water, oxygen, food and electricity.When the white swan successfully landed on the tarmac built on the dam body under the cover of much denser anti-aircraft artillery fire, Wu Chen finally understood why this place became the fifth human settlement.

First of all, she has water and electricity.Secondly, because it is an extremely important building, the elite dam guards were stationed before the end of the day. They resisted the first wave of attacks from flying dragons, and the solid dam body made of reinforced concrete also blocked the attacks of flames and sharp claws. .Again, there are fish in the river, which perfectly solves the food problem.

When Wu Chen followed the elevator to the depths of the dam body, he discovered that there was a lot of articles in it!

The continuous power supply makes the entire dam body built into a vertical and horizontal rail transit hub.There are rows of high-speed elevators going up and down, and rows of light rail trams coming and going.

The elevators are fine, but where do these trams go?

Soon, he found the answer: the train leads to the bottom of the river!

The fifth settlement is an underwater city built on the upper reaches of the river relying on the dam body!

It turned out to be an underwater city!

At a glance, brightly lit high-rise buildings rise one after another, and fantastically shaped submarines are lined up in a long line. The transparent and closed water-proof pipes connecting the buildings and submarines are just one after another!

"Where does the oxygen come from?" The question was not at the level of a technical geek.

"Oxygen produced by electrolysis of water." The immigration officer accompanying him explained with a smile.

What the Three Gorges lacks most is water and electricity.Wu Chen nodded, and followed him to see many shell-shaped underwater farms.Do you only eat fish?After asking, I found out that the giant spiral building occupying the center of the water body is the most important source of food—an agricultural plantation.The maximum water storage depth of the Three Gorges is 175 meters, which is 58 floors if converted into floors.Fire dragons obviously can't swim, so it's quite safe to live here!

"How many people can the city accommodate?" After reading it, Wu Chen was finally relieved.

"5 people." The official blurted out.

Wu Chen nodded: "I will try my best to fill it up for you."

But the official's face suddenly changed: "You, can you really do it?!"

"Of course." Wu Chen raised his eyebrows.

"Then please!" Ninety-degree bows or something, the otaku said it was trivial.

The biggest impact of the doomsday on human beings is reproduction besides survival.

The underwater city solves the problem of human survival, and the reproduction of the race requires constant input of fresh blood to prevent the tragedy of inbreeding.At this time, apart from being envious of the reptiles that can reproduce parthenogenetically, human beings can only pin their hopes on the great sky angel.

"To be honest, we haven't seen the Air Angel rescue team for a long time." The official led Wu Chen into an underwater motorboat.

Wu Chen scratched his head with a smile: "I guess I'm the last idiot."

"No, sir. You deserve the respect of all mankind more than ever."

"Very human?" Wu Chen joked.

"I have another description." The strong retroflex is an Australian dialect that cannot be changed, "Noah's Ark."

The motorboat uses the waterproof cabin to swim in the vast and fascinating underwater world.At Wu Chen's request, officials are taking him to the 'slaughterhouse' in District [-].Compared with the bloody massacre in the seventh district, the slaughterhouse in the fifth district is obviously much more civilized.Because these dragons, without exception, were drowned.

The work of the dragon hunters in the fifth district can be described as heaven.

They only need to use an iron-hulled barge full of salted fish to set a trap at a suitable position, and the hungry dragons will drown in the river regardless of their own safety.

The general process is as follows: the iron shell filled with salted fish has been refuted by the barbed wire grid, and there is nothing left.However, it is the barbed wire that separates the salted fish at the bottom of the cabin and becomes a fatal gap that the fire dragon cannot cross.Without this layer of barbed wire, the long neck of the fire dragon swooping down and skimming the barge at low altitude can ensure it eats delicious food.However, because of this thumb-thick barbed wire, everything was in vain.

The fire dragon must land on the barbed wire, and try to tear the layer of grid with its sharp claws or mouthparts, so that it is possible to eat the food under it.

The danger happened the moment it landed.

The specially treated barge will collapse, disintegrate and sink like building blocks at the moment of impact.The flying dragon, which lost its support, had no time to react, and fell into the water with a splash.

Now is the time to test your swimming skills!

And the flying dragons also proved with real performance: they are indeed landlubbers.

Simple, really that simple.

Because of the development of black technology, in addition to the slaughtering function, the slaughterhouse also has a fire dragon research institute.Hearing that there is a hidden profession that stands high on the mountain—Sky Angel, the extremely excited dark scientists seem to be professional star fans who have met their idols, and it is no secret to Wu Chen.After Wu Chen learned about the body structure of the fire dragon in detail, he finally asked the question in his heart: "Everyone, have you ever heard of a scientific madman who studied the mutation of the fire dragon?"

"All of us." The white-bearded grandfathers nodded in unison.

"What did you find?"

"There are no advantageous genes that can be used by humans. The gene sequence of the fire dragon is more like it was designed. It is perfect and stable. Compared with our genome, it has great 'elasticity'."

"Elasticity?" Wu Chen couldn't comprehend.

"Yes, just like gummy candy, we can't chew it. We can't be separated, let alone 'grafted'. And even if they are forcibly fused, the low-level genes will be swallowed by the fire dragon genes as food."

"Understood." Wu Chen thought for a while and said, "I heard that there are eggs that can be hatched in the female dragon's body?"

"Yes. Some are fertilized eggs, and some are not fertilized. But once they leave the mother's body, these eggs can no longer hatch. We have tried many methods, but all have failed. We even wondered whether these fire dragons were created by someone , specifically to play with our..."

"All paths are blocked, aren't they?" Wu Chen couldn't help thinking, how much hatred would it take to kill people without letting humans take advantage of them?

"Everyone, I need some good guys. Do you have any good ones to introduce?"

"Yes!" The grandfathers raised their hands in unison.

Filled with dragon weapons and various aquatic products, the white swan took off again and rushed to Eielson Air Force Base.

The white swan put in the last batch of refugees, and the general stretched out his whole body: "Your Excellency, we learned from the refugees that there are many refugee spots in this continent. Leave it to you."

The map has been refreshed again.

Wu Chen nodded with a smile: "That would be great."

The white swan took off again and rushed to the fifth settlement.

On the way, Wu Chen and Claulia seriously discussed the possibility of underwater cities.

The Three Gorges Dam is at an important fulcrum.It not only blocked the burning and destruction of the flying dragon, but also provided all the necessary conditions for the subsequent underwater construction: personnel, machines, food, power and determination.The busy Yangtze River waterway provided the necessary conditions for the gathering of large machinery, construction materials and labor.In this way, first excavate deeply in the dam body, and then excavate horizontally. Before the building breaks through the river bed, the ventilation pipe and waterproof membrane are laid.Then expand layer by layer until the entire city is built.The reinforcement of the dam must be an essential link during this period.But in the face of survival, this is not a problem.

From this point of view, only the Three Gorges can build underwater cities.

The reason is simple. Where there is a dam, the water is not deep enough; where the water is deep, there is no dam; Where the defenders still have people, shipping is underdeveloped...

From this we can draw the conclusion that regardless of natural or man-made disasters, the end will come to China.

Unconvinced, think about 2012?

The earth is completely flooded, don't we still have the Himalayas standing out...

After several blind-eyed fire dragons were shot in the air, the white swan landed safely.The elevator was sent into the dam body, and immigration officials had already rushed to greet him.

"Captain Wu, is the cabin still full?"

"It's not full this time, and the rest of the refugees are here." Wu Chen handed over the list, "275 people."

This is no small surprise.Moreover, many of the refugees transported by Wu Chen were young and middle-aged people with strong bodies.Only these people have enough physical strength and perseverance to avoid the fire dragon's hunting.

"Okay, okay." The immigration officer was happy.Although the world is unified, the male official who is originally from Australia is still happy from the bottom of his heart to see more Caucasians coming.As a noble hidden profession, Wu Chen does everything for free.But the established rule is that the assisted human survivors must provide spare parts maintenance, fuel replenishment, and supplies of daily necessities.

Wu Chen's is a nuclear-powered plane, so he doesn't need fuel, not to mention the white swan parts that have all been transformed by Cybertron technology, so after discussing with him, he simply converts them into life support points and puts them all in his card.

"Captain Wu, 27500 points have been stored in the card."

100 points per person, although the value of human beings is far more than that, but to Wu Chen, who has a net worth of 20 resource points, it doesn't matter how much.

"By the way, there is a telegram from you."

"Telegram?" Wu Chen was stunned.

"Most of the relay stations of the wireless network have been damaged, so the telegram has become the fastest and cheapest means of message transmission." The official smiled and handed the handheld computer to Wu Chen.The interface is a tape recorder, yes, if you really want to give him a telegram, Wu Chen will really complain.

"Wu Chen, I'm Die Wu. Park Jinji learned from a South Korean refugee that there are still many survivors in the Seoul subway. We are still confirming the specific information, keep in touch."

Returning the computer to the officer, Wu Chen turned and returned to the plane.

The subway shelter was no surprise.Just like there are survivors in South Korea.In the same way, the reason why island countries with developed economies such as South Korea, Japan, and the United Kingdom cannot become a haven of refuge is that the urban agglomeration brought about by development has squeezed land resources to the greatest extent.When the society regresses to worry about filling the belly all day long, gorgeous technological creations such as mobile phones and tablet computers quickly lose their high added value.Of course, the narrow strategic space of the island nation is also a decisive factor that cannot last long.

Even if the subway can guarantee personal safety, 20 years have passed, and the hungry people have eaten up everything they can.

Wu Chen didn't want to think about it any further.