Entropy Monument

In 2077, when China's lunar exploration project "Chang'e 18" was performing routine exploration in the Von Kármán crater on the far side of the moon, it accidentally discovered a black cuboid with proportions accurate to the atomic level. Its surface is absolutely smooth, with a constant temperature of 2.7K. It does not reflect any electromagnetic waves, but it can reverse all entropy-increasing processes around it: broken beakers automatically restore themselves, withered vegetation regains life, and tumors in late-stage cancer patients dissipate on their own. Humanity fell into a nationwide carnival and built a "City of Hope" with a diameter of 200 kilometers around the Black Monument, announcing the complete end of the era of disease and aging. Only theoretical physicist Chen Jing glimpsed the cruel truth behind the miracle from the tiny changes in the solar nuclear fusion rate: the Black Monument is the "entropy pump" of the advanced civilization of the universe. The price of local reverse entropy is to spread destruction and chaos evenly to the entire solar system. The sun will turn into a red giant within a thousand years and swallow the earth. The truth was deliberately covered up, and Chen Jing was labeled an "anti-humanity element." Humanity is divided into the hedonistic faction who indulges in bliss and the lawful faction who adheres to rationality. The latter goes underground on the Qinghai-Tibet Plateau and secretly builds a light-speed ark. When the solar super flare tears apart human dreams, the fire of civilization and the countdown to destruction begin at the same time the final race.