"Dear citizens of the Dungeon No. 1183 of the League of People's Union, according to the latest observations, the sun will burst out with helium flash in 30 minutes."

"Human civilization has entered the countdown to the last 30 minutes."

"We... failed."

In the dungeon 500 meters deep from the surface of the earth, a female voice with a heavy tone can be played in the speakers everywhere.

An indescribable suffocation deep in everyone who hears the radio.

Lu Yongchang sat expressionlessly in front of a holographic projection image.

In the holographic image, a huge fireball is burning quietly in the deep universe.

This is the sun's picture at this moment.

Lu Yongchang took a deep breath, stretched out his right hand and waved a gesture in the air.

The proportion of holographic images suddenly shrank, showing the full picture of today's solar system.

Unlike the previous solar system, two planets have disappeared in the solar system at this time.

Venus and Mercury have been swallowed by the sun!

And the sun also turned into a crimson giant!

In astronomy, it has an exclusive name.

Red superstar!

"Yongchang...we, no, humans perish like this?"

A slightly helpless female voice came from the side.

Lu Yongchang turned his head and looked at him.

A woman in a white coat sat on a chair, looking at the holographic projection in front of her with a dull look.

Lu Yongchang's eyes moved slightly.

As the chief scientist of the People's Federation of Sciences, this woman named Su Yutong is his partner and his right-hand assistant.

"Yes, humans are finished."

Lu Yongchang sighed softly and continued, "There are more than twenty minutes left. Do you want to go to the surface to see it?"

Su Yutong's eyes moved slightly, she took back her gaze from the holographic projection in front of her, and slowly stood up from the chair.

She reached out and unbuttoned her long black hair, facing Lu Yongchang, and showed a bright smile.

"certainly."

...

In the elevator in Dungeon No. 1183, Lu Yongchang and Su Yutong were wearing heavy protective suits and were silent.

On the elevator screen, numbers showing the current depth are constantly beating.

A little sigh flashed in Lu Yongchang's eyes.

In 2045, the sun on which humans depended for survival was affected by unknowns, ended their youth and middle-aged years and entered aging ahead of schedule.

In just five years, the sun entered the stage of red giants, swallowing two planets in the solar system one after another.

The humans who were forced to a dead end eliminated various barriers and established a Federation of Humans, referred to as the Federation of Humans for short.

With his status as a top student since childhood, Lu Yongchang has been through the difficulties and successfully won the title of chief scientist of the People's Federation of Sciences!

In his calculations, even though the sun entered the red giant stage early, it still took hundreds of years to burst out helium flashes.

Because the surface is no longer suitable for survival, under his call, the People's League established countless dungeons, and all humans entered the dungeon to take refuge, and at the same time began to build interstellar spacecraft.www.bǐqυgetν.℃ǒm

But obviously, he calculated it wrong.

In just five years, the sun has spanned billions of years of life for other stars!

The helium flash is about to explode!

The Earth, as the planet closest to the sun, will be melted into a magma ball without surprise.

Human civilization has come to its end!

"bite!"

"Dear Chief Scientist, I hope your research mission on the surface will be a complete success."

A crisp reminder awakened Lu Yongchang from his meditation.

He looked at the elevator screen.

518℃

This is the surface temperature outside.

The elevator door slowly opened, and a wave of heat came to the face with the twisted air!

Looking at the huge red superstar above his head and the churning surface of the heat waves, even with the presence of protective clothing, Lu Yongchang still felt a sense of heat!

"One minute left, the helium flash is about to explode."

Su Yutong's slightly cold voice came from the radio.

Lu Yongchang didn't say anything, but just raised his head and looked at the sun through the filtering mask.

As the only higher civilization on earth, he doesn't want to bow his head to death!

"You know, how much effort did I put into being your assistant?"

"You know, why I did this?"

Perhaps it was because at the last moment, Su Yutong's voice was filled with relief: "Because, I like you."

Lu Yongchang's pupils shrank suddenly.

Helium flash burst!

The extremely powerful white light sprinkled on the earth from the red giant star!

In just a moment, Lu Yongchang lost consciousness.

...

There was a fluorescent green in front of my eyes.

A white line slowly extends, drawing a tree-shaped diagram in the background of the fluorescent green void.

Lu Yongchang looked at everything in front of him with some confusion.

This...what is this?

A faint flash lit up at the bottom of the tree diagram.

Subconsciously, he turned his eyes to the bottom of the tree map.

Nuclear energy control: controllable nuclear fission.

A line of highlighted white fonts appears.

The next moment, the white area begins to extend upwards.

Nuclear energy control: controllable nuclear fusion.

As this line of originally bleak text brightened, countless words and symbols instantly drown Lu Yongchang's consciousness!

...

"Lu Yongchang!Lu Yongchang!"

"Professor Guan is calling you! Lv Yongchang!"

In a daze, familiar low voices came from my ears.

The sight gradually became focus.

What caught my eye was a classroom.

Looking at the old man who was frowning at the podium, Lu Yongchang's pupils shrank slightly.

Professor Guan Hualiang!

He...didn't he die five years ago?!

"Lu Yongchang! This is the first university physics class! I don't like physics so much, why do you apply to the Department of Physics?!"

Guan Hualiang's voice was a little angry.

Lu Yongchang looked confused, subconsciously stood up, turned his head and looked around.

Familiar scenes.

This is...his university classroom!

If you remember correctly, this is his first physics class in his sophomore year!

He hurriedly took out his cell phone from his pocket and pressed the screen.
To be continued...