The Qin has unified the realm, and the land is at last at peace.
The old maps are riddled with errors, making it impossible to tell the real mountains and rivers from the imagined ones.
The First Emperor issues an edict establishing the Bureau of Geographic Survey. He appoints Xu Yue as its envoy, equipping him with measuring tools, a viewing tube, and an astronomical instrument, then sends him east from Xianyang to survey the lands beyond the passes.
Along the way, he surveys mountains and rivers, establishes borders, studies historical sites, and observes the people's lives. He uses actual measurements to dispel falsehoods and an accurate map to bring peace to the realm.
Confucian scholars criticize him, alchemists spread wild claims, and old ministers obstruct him as undercurrents surge.
But Xu Yue wields his brush like a sword and uses the land as his paper, drawing stroke by stroke the true mountains and rivers of the Nine Provinces of the Great Qin.
From Langya, gaze out over the sea, and the realm lies on the map. Measure the Nine Provinces, and the mountains and rivers will find their way into your heart.