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On the 7th day after World War III, nuclear winter was -40°C, and the world had only one way to survive: run south! Cheng Jiye, a former PLA railway soldier and Tsinghua University nuclear physicist, transformed the 16-section high-speed train into a doomsday fortress, carrying 1,132 people along the way. For every kilometer traveled, the temperature rises by 0.01°C, and the end of the track is a 42°C life-limited zone; every kilowatt-hour of electricity burned results in a life. Extreme cold, nuclear fallout, volcanoes, AI hunting, dungeons explode in succession; live barrage voting, who will be thrown off the train in the next second? When you get on the bus, you live, when you get off, you die - the terminal, the equator, or hell? Click it and rush towards the 42°C salvation together!