Lu Ying's eyes rolled, and the corners of her mouth raised slightly, "That's not necessary, I'll test you now." ”

With that, Lu Ying took Yaxuan to the reading table in the library, and opened the original era catalog along the table of contents.

"What is this about?"

"The Interstellar History of Blue Star Migration."

When Lu Ying heard the words 'Blue Star' and 'Migration', she lowered her eyes, and was a little moved in surprise.

She is a person from a bygone era, and in that era, there were often people who sang about it, and humanity would inevitably bear the consequences of its own overdevelopment and destruction of the planet's environment.

It's just that I didn't expect to see the consequences directly, without a trace of concealment, and brutally presented in front of me.

"When did the Blue Star be destroyed? What is the reason? ”

Yaxuan propped one hand on her cheek, her fair skin was overwhelmed and showed a faint pink, and her watery deer eyes stared at her, "Few people are willing to ask this, Teacher Yin, why are you interested in this matter?" ”

You can't tell him that you want to know how long it will be before you go back to meet the fall of the Blue Star and the migration of the end times, right?

Yaxuan said four words.

"Catastrophe."

The version of the detailed explanation is: the originally recoverable ecosystem is completely irreversible, and the terrible consequences hit like a mountain and a sea, human beings withered, the living area gradually shrank, and the global organization unanimously determined that the blue star could no longer be used for human survival, and started the interstellar migration plan.

"Probably in the year 3094 of the original Blue Star."

Lu Ying breathed a sigh of relief.

She doesn't have to deal with the last days when she goes back, but can only ask her descendants to ask for more blessings.

If this future is a given future, it is not so easy to change.

If you really want to change, you have to pay a great price.

This is also the reason why the Yin-Yang family has always regarded traveling through the past and the future as a ban.

"Teacher Yin." Yaxuan yawned, leaned over the table, and swept her face lightly, "You make me feel as if I saw you somewhere else." ”

Lu Ying's alarm bell sounded.

She pretended to touch her short hair unintentionally, and turned her head to avoid his burning gaze, "No? ”

"Yes, yes...... Is it? Yaxuan's tone gradually deepened, closed his eyes, and fell into a light sleep without warning.

"Huh...... Eh, Ya-san, did you sleep? Lu Ying asked him in a low voice.

Seeing that he was completely motionless, Lu Ying had no choice but to open the heavy history book by herself.

At present, human habitat is divided into five galaxies, except for the third star system, which collapsed many years ago, the rest of the galaxies are scattered with human beings, and the actual living area does not even reach 20%.

The third galaxy was the location where the human migration plan first settled, and at that time, resources were scarce, and the remaining energy was not enough for ships to continue to explore, so it temporarily took root in the third star system.

And then there's—

Unexpectedly, the most important prop was excavated in the scattered Fourth Stars, the energy crystal.

He is still studying his manufacturing method, and at present, mankind has mastered the method of stimulating the precise energy supply of energy crystals, and a small one is enough for half a year's energy reserves for a planet.

Lu Ying remembered the energy crystal that had been placed on her desk on the day of training.

People who have a way to get this thing are certainly not ordinary.

It's no wonder that the academy center isn't willing to reveal too much.

"Oh, I remember!" In front of him, Yaxuan suddenly raised his head, his dark eyes flashed with dazzling brilliance, and he swore an oath, "You are the Seventh Princess." ”