Save the Sun

During the long voyage of the immigrant spacecraft, civilizations fell apart, and the originally sophisticated systematic society degenerated into a medieval order where steam, gears, and oral procedures coexisted. On this ship, the "sun" is not a celestial body, but the core system that maintains oxygen, water circulation and energy balance in the ecological cabin. When the core failure approaches criticality, the output faction, the engineering faction, and the magic faction are forced to join forces amid differences: Some people advocate stabilizing order first, some insist on repairing the unit first, and some demand the truth be disclosed first. Night shift researcher Ji Heng accidentally rescues the tracked liaison officer Shen Tinglan, and a deleted report reveals the truth about the crisis. From the bacterial pond to the condensation tower, from the bell order to the signature, they must complete the same thing in the countdown: Save the "sun" and keep this immigrant ship sailing.