Traveling through Zhenguan of the Tang Dynasty, Cheng Huan was exiled to Mobei at the beginning, with a sky full of yellow sand behind him and starving people everywhere in front of him. Everyone said that he was bound to die, and the Turkic cavalry would crush this desolate land at any time. But he casually picked up a broken tile, and a cold mechanical voice sounded in his mind: [System activated, farming flow construction module started! As long as he plants a seed with his own hands, it can instantly grow into a towering tree with a ten thousand times increase, and wasteland can be transformed into fertile farmland in the blink of an eye. Three years later, the Turkic army came to the city, and what they saw when they looked up was the 100-meter city wall made of steel; at the top of Chang'an City, Li Shimin looked at the miraculous city rising from the wasteland, his voice trembling: "Tell me... Whose fiefdom is that?" Cheng Wan was sitting in the city lord's palace, looking at the new mission that popped up on the system panel: [Unlock Technology Tree·Steam Age] [Next stop - Chang'an!
