Countless people wept bitterly.
As if they had seen the scene of rockets from the old days rising to the sky, stepping into the sea of stars.
One small step for humankind, one giant leap.
The historical significance before us is no less than humanity's successful rocket launch, the first journey into the sea of stars.
Five thousand years later.
Space train technology was fully matured.
Various long-distance underwater trains extended in all directions at the subway stations beneath each ocean island.
Traveling to other galaxies became extraordinarily simple for people.
The civilization of this era began to be named after Sona, known as the Sona Civilization.
They harvested resources from the distant star sea, entering into an infinite resource mode.
The sub-oceanic metro network was vast, and the numerous space trains made the tourism industry of each galaxy exceptionally prosperous.
Yet eighty thousand years passed.
Sona received a call from their teacher.
