On April 14, 2036, the Moon deviated from its normal orbit by 3.6%, its gravitational pull decreased, and a global tsunami broke out on Earth, submerging 70% of the land!

On July 18, 2036, the surface temperature will gradually rise, a large area of the ocean will be evaporated, the oxygen content in the air will begin to decline, the intensity of ultraviolet rays will rise wildly, the earth's ozone layer will be destroyed, and the entire earth star will begin to enter a stage of ecological regression that cannot be stopped.

On November 27, 2036, volcanic eruptions, cracked land, earthquakes, plate shifting, and at the same time, the depths of the fractured ocean, the melting of icebergs in the north and south poles, and the emergence of prehistoric giant creatures under the equator, extremely ferocious, 90% extinct of the world's animals, plants, and humans.

Humanity has entered the Age of Savage! Struggling!

Three years later, above the sky, at the top of the clouds.

The silver-colored, scarred-looking but infinitely scientific charm of the building is floating in the air.

It is humanity's last hope, created by all the top scientists of the Dragon Nation.

It is used to face the important weapon of the country in the Age of Savage.

The chief designer Su Han and the number one boss of the Dragon Kingdom are jointly named Sky City!

After the disaster, the dragon kingdom did not bow its head, but united as one, uniting all the top scientists.

With the strength of one country, the city in the sky was created, the greatest miracle in human history.

On the deck of the "Castle in the Sky".

All gathered here, in front of them.

It was proposed and personally designed the core engine of the "Sky City", Su Han, the chief scientist of the Dragon Kingdom.

Su Han's eyes were sad, there were seven billion human beings, and now only these thousands of people were left!

And they, too, are finished!

The air was silent, as if a boulder was pressing on everyone's hearts, and Su Han's desolate voice spread in all directions: "All the surviving human compatriots, I regret to tell you that we have failed!" ”

"The collection of power has completely failed to keep up with the consumption, and the data given by the power department will last for a maximum of three hours."

Su Han looked pained.

"What if...... If you give me some more time, even for a month..."

The Savage Era lasted for three years, and Su Han had already conquered everyone with his wisdom and dedication.

Even so, the time given to him was too short,

The rapid outbreak of disasters has devastated the land.

His hand rested on the edge of the castle in the sky, feeling the cold metal tremble slightly.

Su Han knew that this magnificent city in the sky was even called the greatest miracle of mankind.

It's about to lose momentum and fall.

Looking into the distance, the light on the horizon is like the gaze of the gods, beautiful, but there is no room for human survival.

In a trance, Su Han seemed to see that the earth star had not changed before it had changed.

December 6, 2039, humanity's last refuge.

The city in the sky fell.

……………

Sitting up from the bed suddenly, Su Han looked around, his eyes full of disbelief.

He jerked his phone and pressed the screen on.

The time on the screen was clearly reflected in his inky pupils.

"April 1, 2036!"

Su Han's breathing was heavy for a moment, and then quickly subsided.

Many thoughts flashed through my mind, and in the end, only four words remained.

I am back!

Back in time when the Savage Age didn't happen yet!

After calming down, Su Chen sat up from the bed, put on his coat and sat in front of his desk.

turned on the computer, and the faint computer light shone on Su Han's face.

"There is still half a month before the moon has an orbital shift..."

Recalling the time of the disaster in his memory, Su Han casually created a folder and typed out one character after another.

At the beginning, he knew that the disaster had happened, and he returned to school as soon as possible.

And it emerged and entered the core scientific research team of the Dragon Kingdom at the fastest speed.

But by then, it was already too late.

For countless nights, Su Han was thinking about what if he could start preparing as soon as possible.

Will there be a different outcome.

Now, this opportunity is in front of him!

Half a month passed in a flash, but the corners of Su Han's mouth outlined a confident smile.

Ordered in danger, the entire Dragon Kingdom can work together to build an incomplete sky city when disaster strikes.

Now, I have prepared myself, how can I let the tragedy of my previous life repeat the mistakes of the past!

"A generation engine codenamed Tyrannosaurus King."

"The construction plan of the codename Buzhou Mountain."

"And most importantly."

Su Han's gaze shifted to an ancient mythological book in his hand.

On the cover of the book, a goddess with a remarkable demeanor is holding her hands high, making up for the loopholes in the sky!

"Restore the ecological environment, codename: mend the sky!"

"It turns out that Sky City's plan is going in the right direction, as long as there is enough time to perfect."

"The city in the sky can definitely lead humanity through the crisis!"

"As for now..."

Thinking of this, Su Han entered an email address on the web page, excerpted some of the documents he had recorded, and sent them to a secret mailbox.

Half an hour later.

Su Han continued to improve the plan step by step.

The time left for him was only half a month, and in this half month, Su Han's goal was to ensure that the entire Dragon Kingdom would not suffer too serious losses in the first wave of the tsunami disaster.