Tempered Foam

At a certain moment in the world, when human civilization was glorious, heretics quietly invaded this innocent planet. The world is developing rapidly, all industries are rapidly being regulated, and 90% of industries are monopolized by super giants. They completely integrated the scattered productive forces and jointly built a super city called "Century Central City". All the powerful and capital in the world were merged into it. Century Central City rose from the ground, leaving the shackles of the earth. At an altitude of nearly 300 meters above the ground, it completely separated from the remaining "poor", "inferior" and "barbaric". In the endless energy, the world is rapidly chasing the existence of the boundary, ushering in a new era of drastic changes called "chasing".