When the earth was covered with floods.
When all the interstellar people looked over, they could only see a blue, gem-like planet, which they called the Blue Star.
When all lands and cities are submerged.
How can human civilization survive if it regresses in an instant?
When the technology that humans rely on for survival is corroded.
All lifestyles are like primitive times.
As you cruise above the city.
Humanity has evolved a long time ago.
When you look down at the heart of the ocean in the universe again, the blue star.
A new civilization has awakened.
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This article is not about survival in the wilderness, so it is more about the settled human underwater society and what happened after leaving Blue Star. This article is semi-empty, basically talking nonsense about the ecological environment, and directly simplifies the biological chain.
Purpose: If you don't have an ark, you have to save yourself