In 9855 AD, the moon fell out of control, and the distance between the earth and the moon suddenly shrank from 380,000 kilometers to 70,000 kilometers. Tides swallowed up cities, volcanoes cracked the earth, civilization collapsed, and mankind returned to the age of barbaric tribes.
Chu Fei, an all-round university teacher in 2026, wakes up and travels to 7,800 years later. He had no strength in his hands, but he had the entire modern civilization in his mind - physics, chemistry, agriculture, engineering, and medicine.
When they first entered the Chiling tribe, the tribesmen were so hungry that they ate moldy dried meat, were blocked by wolves and dared not go out, and a minor illness could kill half of their lives. Chu Fei uses knowledge to reduce dimensionality and attack: making salt, making iron, making crossbows, clearing wasteland to grow wheat, and predicting tides. In half a month, Chiling counterattacked from the brink of death to dominate one side and formed an alliance with the twelve tribes.
But the real crisis is in heaven. The ruins tablet reveals: The lunar base is out of control, leaving the earth for less than two years. Chu Fei formed an expedition team of 37 people, crossed rain forests, volcanoes, deserts, and ice fields, arrived at the ruins of Antarctica, and flew to the moon. 19 People fell on the road.
After landing on the moon, it was discovered that the base was divided - the pushback faction wanted to save the earth, and the destruction faction wanted to let the moon crash. One day for the moon and fourteen days for the earth, counting down every second.
In the final battle, six people died fighting the moon. The survivors activated the device and the moon was pushed back into orbit a month before impact. 37 People set off and 8 people returned to Chiling.
Knowledge crushes the wilderness, and sacrifice tempers faith. Hard-core survival + epic expedition + science fiction suspense - one person uses knowledge to fight the doomsday, carries the bones of his comrades on his back, and carves "go home" into the steel of the moon.
