On a rainy night, programmer Lin Du wakes up and becomes a runaway girl from ancient times, with only half a bag of moldy grain seeds left. She combined the "Wasteland Planting System" and planted the first mutated rice ear on the cracked river bed. Three years later, when hungry people flocked to this wasteland again, they saw - ten miles of rice fields with golden waves, intelligent water canals for automatic irrigation, and drones sowing seeds in the clouds. And the girl who had been laughed at stood on the top of the granary and smiled at the stunned county magistrate: "How much grain tax will you pay this year?"