The sun suddenly "stuck" above the horizon, and the earth was permanently daytime and nighttime. 2. The temperature in the extreme day zone soars to 80°C, and human skin begins to crystallize and peel off like salt frost; in the extreme night zone, the temperature is minus 120°C, and exhaled water vapor directly freezes into ice needles in the air. 3. A "twilight zone" corridor appears in the middle, with a temperature of 15°C, but it has become the only survivable zone in the world. The corridor is less than 40 kilometers wide but needs to accommodate 7 billion people. 4. Resource algorithm: Corridors can only produce oxygen for 12 hours a day, and the rest of the time is allocated "breathing quotas" by AI. 5. The protagonist is a "time smuggler" - he can sneak into the Extreme Day District, refine other people's "crystallized corpses" into a new type of chip, and sell them to the rich in the Extreme Night District who want to use mechanical bodies to survive.
