There is no extra introduction, and the reason is explained in a few words.

Then, go to the topic.

Su Jianyang spoke slowly.

"At first, no one knew where they came from, just to think that unknown species appeared where they appeared. The unique body structure of alien species and the pollution emitted at all times seemed to open the door to a new world and make the world go crazy."

"Until half a month later, the first abyss crack opened."

"There are not very powerful aliens. Some are just second-level aliens that seem to be unremarkable now. As if they have been negotiated, cracks appeared in various countries at the same time, with a total of 36 cracks."

"The alien species are not very strong. First-level alien species and ordinary bullet fire are enough to easily tear their bodies apart."

"But the terrible thing about alien species is not its strength, but its price, the price of killing alien species."

The tone specifically emphasizes the word "cost".

And Su Jianyang picked up the chalk, turned around and dropped the two words on the blackboard.

"Anyone who kills aliens will definitely bear the price, and this price is the unique pollution of the alien's body."

"In that era when extraordinary things were not yet born, even if you kill the weakest first-level alien species, you may have the costs of 'hand shaking', 'palpitations', 'gasm', and 'tinnitus'."

"More serious, fractures, temporary blindness, sensory chaos... On the battlefield, any price is enough to be fatal."

"And we humans can only reduce the cost, and we can never exempt the cost."

"In other words, even if the fifth-level strongest man faces tens of millions of first-level alien species, even if he can kill tens of millions of alien species alone, he will be seriously injured or even die in the face of the accumulated cost."

Jiang You stared at the figure on the stage in a daze.

"However, after people discovered this rule, they tried to use heavy weapons to suppress them from a long distance."

"The cost of the first and second-level alien species is not enough to be blessed by people across such a long distance. Our world is temporarily stable."

"It's just that as the number of cracks increases, the pollution that fills the world gradually increases, and the world has undergone tremendous changes unconsciously. Compared with humans, animals and plants are more susceptible to pollution, alienation, and the wild is no longer safe."

"On the New Year's Day in the second year of the new era, Beidu and Nandu announced their efforts to establish large gatherings, and plan to gather residents of surrounding towns into the gatherings in batches."

"In the five years of the new era, people tried to enter the abyss, with a mortality rate of up to 97. The Great Zhou also learned about the existence of 'forbidden objects' for the first time."

"Relying on forbidden objects to enter the second level and fight against alien species, the Great Zhou set off a 'forbidden object tide'. At this time, Qi Ling awakened, and his own path to extraordinary still remained at the first level ignorantly and failed to advance."

"In the same year, fifteen small countries have announced their destruction. No one can survive this global crisis."

"In the eighth year of the new era, relying on forbidden objects, the upper limit of extraordinary levels was further increased, and the defense line of the gathering place became more and more stable. And the group of people who became stronger through forbidden objects thought they had found the right direction, so they were also the 'dawn' of the Great Zhou."

"In the 10th year of the new era, the conventional extraordinary route, which is now the mainstream extraordinary route, has finally figured out the path to reaching the second level."

"Also in this year, the Beidu watches the gathering place and the Nandu dawn gathering place were officially established and became the only two first-level gathering places in the Great Zhou Dynasty."

"In the next five years, major gathering places will be established accordingly."

Dawn in Nandu, a first-level gathering place??

This thing is not right.

The Nandu recorded in the textbook... isn't it a second-level gathering place?

Level 1, Level 2.

Two different cognitions constantly impact everyone's thoughts in their minds, causing everyone's expressions to change constantly.

The content recorded in history textbooks is mainly in ancient times. In the past century, the content learned in the entire junior and senior high school study career is all collected, and probably half of history books can be collected.

It basically tells the story of the great famine, great struggle and great migration under the impact of alien species.

The land area of ​​the Great Zhou Dynasty was too huge, so the small city could not be defended, so they could only unite to establish a gathering place.

This leads to relatively dispersion between the various gathering places.

Therefore, later, the alien species became stronger and stronger. In order to facilitate unity and prevent them from being defeated one by one, the first, second, and several consecutive "big migrations" were produced.

Finally they gathered in the north and formed a northern defense line.

These are the "history" that everyone has learned.

Jiangyou naturally knows this history.

But since he saw the starry map in Uncle Lu’s room last time, he has not been sure how true or false this history is.

The screen continues to change.

A map appeared, and red dots lit up on the map.

"Beidu, Qingyang, Mayi, Atai, Xinghuo, Lin'an, Winter, Changyang, Nandu, Tianfu."

"Ten first-level gathering places are scattered in the Great Zhou."

Ten first-level gathering places??

Where did so many come out?

Everyone frowned and listened attentively.

Some people even had some vague thoughts of being afraid.

"Teacher, why are these different from the history I learned?" A front-row student asked.

Su Jianyang did not choose to answer.

Continue to explain downwards on your own.

"In the 20th year of the new era, the first third-level alien species appeared. The first appearance brought about the third-level alien species tide, and ordinary artillery fire was difficult to fight against. The gathering place of Nandu paid a heavy price to destroy the alien species tide."

"In the 30th year of the new era, the first special species appeared, with a strength far exceeding the same level. Lead an army of alien species to siege Mayi's gathering place. The distance is too close to the point that it cannot use nuclear weapons."

Then what?

Everyone pricked their ears.

Su Jianyang paused for a few seconds and said, "This is the first time that the first level gathering place has been destroyed."

The classroom suddenly became silent.

Only the soothing music coming from the podium always cleanses the ears and calms down the negative emotions that are about to arise.

Leave it to everyone for more than ten seconds to buffer, and Su Jianyang spoke again.

But as soon as I opened my mouth this time, the content behind everyone was overwhelmed.

"In the 40th year of the new era, the first fourth-level alien appeared. During the nuclear explosion, there were alien variants, which came out of the explosion, and then the place where Artai gathered was destroyed."

"In the 50th year of the new era, Tianfu and surrounding areas faced the threat of abyss cracks and alien species, and was in danger, resulting in the first major migration in history."

"There are less than one million people who survive."

The huge number is like a heavy hammer, hitting everyone's hearts.

But, it's not over yet.

It's far from over.

"In the 60th year of the new era, the southwest and northwest of the Great Zhou Dynasty completely became an occupied area and a holy place for alien carnival."

"In the 70th year of the new era, alien species went north. If the Lin'an gathering place is lost, alien species will directly threaten the north."

"There was the second major migration in history, but this time, it was extraordinary and unretreated."

"One hundred thousand young people work together to die, and the Great Zhou Dynasty has thousands of miles of rivers and mountains."

"Refusing to retreat thousands of miles away from different species, and since then it has been separated from the north and south."

"In the same year, the Nandu gathering area tried to migrate, and the route was blocked by the abyss cracks and temporarily put it aside."

"Fight, surrender, seek peace, and give in."

"For decades of fierce battle, it seems that it might be the best choice to retreat to the north as early as the initial cession of territory?"

"So the later gathering places are huge in scale, and any migration will cause damage to the muscles and bones."

"But, is it really better to keep giving in? No one knows."

"The supernatural powers continue to grow stronger, but the cracks expand, and the alien species entering the Great Zhou are getting stronger and stronger."

"The southern capital is trapped, and it is hard to sing. Finally, it is planned to accumulate strength, abandon the gathering place, and move to the north."

"In the 75th year of the new era, the fifth-level special species appeared, shattering the dawn of the Great Zhou."

The classroom was almost dead silent, and the needles could be heard.

The screen moves slowly.

Aerial photos showed that the vast earth was full of devastation.

"The third major migration suffered heavy losses, and we completely lost the South."

"This war has lasted for a hundred years. We have made some mistakes and taken some detours."

"Extraordinary, Night Shooting Office."

"It is a safe haven for most people, a lighthouse to dispel darkness."

"In this century of history, there are men, women, elders, young people, and at a loss in the darkness."
To be continued...