Timeline**: Winter Solstice, 2035. The melting Antarctic ice sheet triggers a reversal of Earth's magnetic poles, ushering in the global "White Night Era." Abnormal solar activity causes surface temperatures to keep falling, reaching -70°C.
- **Geographic features**: A super ice-storm eye 300 kilometers in diameter forms in northwestern China. Its "suffocation zone" contains 300 times the ice crystals found in the standard atmosphere, and a prehistoric virus repository lies buried beneath the permafrost.
- **Disaster levels**:
- Level I (Frostbite Phase): Exposed skin suffers frostbite in 30 seconds.
- Level II (Bone-Chilling Phase): Metal becomes brittle, and gasoline freezes.
- Level III (Eternal Silence Phase): Sound waves are impeded, and electronic devices fall permanently silent.
