Survival: I Overhauled the National Technology Tree

[Apocalypse + Rebirth + Infrastructure + Stockpiling of Supplies + Explosive Fun]

The last record of human annals—

In 2150, disasters occurred frequently around the world, including super earthquakes, 10,000-meter tsunamis, and terrifying extreme cold weather. All mankind was forced to migrate and build arks and dungeons to resist.

In 2153, the doomsday era arrived, the world's oceans froze, all the land cracked and shattered, and the human era ended.

…

In 2149, Gu Yuan, the initiator of the "Foolish Old Man Moving Mountains Plan", was reborn before the apocalyptic era.

He first reported the news to the country, and the whole country worked together to build a space train with the space station as the core, build a giant wall called Pangu Shield to resist tsunamis, and build a giant city called Xuanwu that can accommodate more than one billion people!

A year later, the end of the world came, the West was no longer arrogant, and the East rose proudly.

Pangu's shield surrounds it, the giant city of Xuanwu stands tall, the space train roars and speeds, and chief designer Gu Yuan becomes the savior of the East!

At this moment, billions of people in the West were amazed. The Eastern Flame Dragon is a country of miracles!

At this moment, the whole world shouted in unison: "Please, let us enter the East too!"