Lin Yan, a modern geotechnical engineer, was struck by lightning during a thunderstorm slope inspection and traveled through time to become a prisoner on the construction site of the Lishan Imperial Tomb in the late Warring States Period. Heavy rains caused landslides, and the mountain gods punished them. Thousands of people knelt in the mud and waited to die. He stopped the landslide with a set of engineering data, and also kicked off the era of defeating "ghosts and gods" with "numbers". Recruiting priests, recruiting knights, gathering witch doctors, writing "Work Code", and organizing ghost craftsmen camps, from Lishan Mountain to Xianyang, from the battlefield of the Six Kingdoms to the Great Wall Straight Road, from Lingqu Afang Palace to the ninth floor of the Imperial Tomb, he brought two thousand years of engineering knowledge with him to rewrite the world of this era inch by inch. But when the ancient formations in the Lishan Underground Palace changed, mercury reversed, the craftsmen were poisoned, and both the government and the public questioned whether the "integration of construction methods" was a witchcraft, the numbers he was proud of could not stop people's hearts for the first time. This is a history of road construction in the Qin Dynasty by an infrastructure madman. It is also an epic in which a group of craftsmen use numbers to establish an era.