"Zizizi~"

The public screen on the side of the road emitted a fine sound of electricity, and Cheng Lin seemed to be able to hear the sound of the circuit breaking inside the screen.

The temperature plummeted, a cold wind blew, and the rest of the city background was blurred except where he stood, and the land was covered by a new round of blizzards, and the sky seemed to be dark until night, and then turned to day.

"Click......"

In the extremely cold temperature, the screen finally cracked overwhelmed, black, and completely damaged, but then, a strange scene appeared, the damaged display screen was suddenly covered with a layer of light, and a new pattern appeared on it.

It was a figure of a rotating earth, and the originally water-blue planet was now draped in a white veil, looking extremely lonely and spinning quietly.

[You can tentatively touch it]

Following the reminder of the information in his mind, Cheng Lin stretched out his hand and gently dragged the earth, it spun, Cheng Lin casually clicked a direction, its rapid expansion, and the perspective narrowed from the endless high sky.

That's a city.

It seems to be within the Federation, there are huge English fonts on the frozen billboards in the picture, and Cheng Lin even saw a few Marvel posters posted on the surface of the building, and the superheroes were torn apart by the storm and damaged in many places.

Dense skyscrapers of dozens of floors became icicles, covered with frost, and the streets were cleared again and again, but with little effect.

The picture is silent, but you can see many people and vehicles, which are the people who came out to help the disaster, most of them are wearing extremely thick clothes, and they are struggling to repair them at the time when the temperature is relatively "high" during the day.

There are also a few people who are relatively much thinner, and they should be the cultivators of the Federation.

Someone seems to be shouting, someone is commanding.

Cheng Lin saw the rescuers rescue a fat man covered in blood from a collapsed building, but as soon as he was carried out, the blood quickly froze, and the whole person was lifeless.

There was a lot of sadness, everyone was tightly wrapped, and there was no expression in sight.

Many houses collapsed during the storm, and in such low temperatures, crying is a luxury, and if you are exposed to the outdoors for a long time during the day, your limbs will become numb, unable to move, and then you will freeze to death.

Not to mention the cooler nights, when the night falls and the storm blows, except for a very small number of powerful cultivators, no one dares to leave the building at all, and even so, countless people still die every day.

Cheng Lin flicked the screen again and switched to Australia.

At this time, it should be autumn and summer, the warmest and hottest time.

The vast land is full of green trees and green grasslands, but now, in the picture, this warm land is also covered by a blizzard.

The global blizzard is so unreasonable, the cold wave has devastated the city, the unprepared city is full of wailing, countless casualties, the city has entered a state of emergency, and the surviving people are rummaging through the cabinets to find thick clothing to protect against the cold.

But with little success.

It's getting colder and colder on the surface.

Cheng Lin continued to rotate the earth at will, switching between different places, he thought he could see different scenery, but he was disappointed.

Wherever he goes, as long as it is inhabited, there is only the common theme of disaster relief and grief.

After fiddling with it a few times, he withdrew his hand a little tiredly.

As a result, different images began to flash rapidly on the screen.

It's like switching slides, each picture is a picture of what's happening, and they come from more than 200 countries around the world.

From the Federation to Bactria

From Europe to Asia and Africa.

Countless countries, different nationalities, different nationalities, different colors, and non-linguistic human beings face blizzards and ever-increasing extreme cold weather.

However, this is destined to be a losing battle.

[Three days have passed, the global cold wave has not been alleviated, but continues to strengthen, the ice and snow on the surface are increasing, the ocean is beginning to freeze, the number of human beings has plummeted, and the social ecology has suffered the most serious blow in tens of millions of years.

The heating industry in the city is fully turned on for heating, but the people in the countryside lack an adequate heating system, so the population of various countries is invariably concentrated in a few megacities.

Information comes to mind.

The wind and snow around stopped.

The sky brightened.

"Boom ......"

Once he heard a boom, this time it was no longer a snowplow, but a line of tall, army-green wagons in the distance as they made their way through the icy city.

After a while, these vehicles passed by him, and the whole car was extremely tightly wrapped, but at this moment, Cheng Lin suddenly found that those obstructions had become translucent, which was obviously the credit of the program.

Through the obstacles, he could clearly see the silent people huddled together in the carriage, like canned fish, they were the villagers who had been transferred in, and there were many such vehicles.

No one seemed to notice Cheng Lin, the roadside observer, and when the car was far away, his eyes followed the past, and he saw thick black smoke rising from the city.

[You notice that black smoke is rising, coal is burning wildly, heating the whole city, all trading has stopped, and the materials are under control]

[However, this will not last long, and another ten days have passed, the situation has not improved, and the consumption of coal and the supply pressure of the whole city have gradually become unsupportable, and the world continues to cool, and finally, someone has put forward a new idea]

The scenery that Cheng Lin witnessed changed again, and some large-scale machinery began to appear, destroying the surface with the help of some cultivators.

Cheng Lin saw with his own eyes that a drilling rig centered on a sewer manhole cover began to drill downward, and the entire huge machine sank into the ground, and the metal probe collided with the cold earth.

"Drilling? Sewer? Go underground? ”

Cheng Lin thought in his heart, this seemed to be the only way.

The surface temperature is already too cold, the population is decreasing, and hundreds of millions of people are dying every day.

[Relying on the perfect sewer systems of various megacities, various countries have begun to try to turn people underground and seek survival, which is probably the only way to survive.

The policy was unexpectedly implemented smoothly, and the state apparatus was at full speed, rapidly expanding the underground space, extending in all directions, and building hundreds of years of urban underground drainage system, which saved great effort for human beings.

[In addition, coal mines have also become a battleground, especially the exploration and excavation of decades, even hundreds of years of giant mines, has become a natural shelter, this is an extremely difficult decision, the entire human civilization has been forced to abandon the surface of thousands of years of life, sinking into the underground without sunlight]

[The storm is getting bigger and bigger, the ocean is completely frozen, the entire surface of the earth is covered in ice, and the plants and creatures on the surface are wiped out]

"Click, click, ......"

The turquoise blue earth on the display screen in front of Cheng Lin was like a discolored orange, freezing little by little, clicking.

Gradually, it finally became a beautiful and mellow snowball floating in the universe.

Then, the screen finally shattered completely, becoming countless fragments.

The frozen ocean could not provide a normal water vapor cycle, so the atmosphere was destroyed, and the sunlight suddenly became dazzling, shining on the extinct planet.

……

Cheng Lin suddenly felt that his body was rising.

It was as if he had been pulled up by some kind of force, and he came to the air and looked at the world in a floating posture.

"Is it a new perspective?"

He thought, and was surprised to find that the world in front of him became transparent.

The layers of mountains, countless layers of snow and ice, could no longer block his vision, and he floated in mid-air, independent of the wind and snow, looking down at the surface.

As a result, the soil became transparent, and he was surprised to see the people busy underground.

The entire planet seemed to have turned into a transparent glass marble, and Cheng Lin floated in the air like this, watching the changes in the ground curiously.

"Time is speeding up."

He judged.

Everything underground was changing at a rapid pace, and it was as if he was watching an accelerated movie.

At this time, Cheng Lin suddenly remembered a term called "time-lapse photography", and the scene in front of him was somewhat similar to this.

It was as if he was compressing the construction and development process of underground civilization into a very short period of time.

It's funny.

He gazed meaningfully into the ground, at first, humans were only relying on the sewer system to dig deeper, and gradually, those channels were opened, and they continued to advance deeper into the earth.

During this period, it seems to have stopped a few times, but it seems that the surface temperature continues to drop, and it seems that it has to dig deeper again.

Countless machines are distributed in this vast underground world, and in the huge space dug up, boilers began to be erected, using the original entrance as a ventilation duct to burn coal and supply energy to the entire underground world.

Boilers emitted billowing smoke, and people began to try to use the blizzard on the surface to generate electricity to power underground cities.

In the rapid playback, the underground world gets bigger and bigger, from the initial simplicity and pitiful, gradually, it becomes extensive, complex like a labyrinth, and then begins to be organized, extending downward according to the spiral trajectory.

"Humanity has clearly found the most reasonable and efficient way to build it."

Cheng Lin commented in his heart.

Next, the original tunnels on the surface began to be used for ventilation, and people were able to find underground coal, oil, and deeper geothermal energy sources during the excavation, which freed them from the problem of supplying electricity to the surface.

"Everything is slowly getting better."

In Cheng Lin's eyes, humans began to continue to migrate deeper, and the thick soil isolated the cold, so that people were no longer attacked by deadly cold waves, but the long-term underground life also caused danger to people's bodies.

As a result, artificial sunlight appeared, and they were built and embellished in the key hubs of the underground city like street lamps of the old era, making the dark world a little more beautiful.

"Technology is regressing? Or is it a deformed progression? ”

Cheng Lin found that in the process of excavation, the direction of the world's science and technology changed from the very beginning of high-tech, virtualization to a rough steampunk style.

Not really degraded, but heavy machinery, gears, exhaust pipes, probes, robotic arms...... and the rapid development of large-scale energy has become the main theme.

This prompted human aesthetics and art to also begin to develop towards a rugged style.

"It's inevitable, well, they stopped."