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An asteroid arrived unexpectedly, and what was equally surprising was that this asteroid was extremely rich in carbon. Scientists have devoted global efforts to build a closed super cylinder with a diameter of 20 kilometers and a height of 50 kilometers using a super 3D printer using graphene allotropes generated from carbon elements at the Lagrange L2 point. The super cylinder generates a gravity of 1 G perpendicular to the direction of the inner wall by rotating inside the cylinder, and then builds various living facilities on the inner wall to create a new environment suitable for human habitation. A new humanity is born. However, any great journey cannot be smooth sailing. Another unexpected encounter brought them a huge crisis. In order to save the new humanity, they turned the tide and the heroic story wrote a new legend.