Dragons are not physical creatures, but spiritual manifestations of the “dragon veins” beneath the land of Huaxia. When the dragon veins thrive, the nation prospers; when they weaken, disaster follows. The 749 Bureau’s most important department is the Dragon Vein Patrol Division. Their job is to periodically “take the pulse” of the land like traditional Chinese doctors, soothe restless dragon-vein nodes, and clear away the “baleful energy” corroding them.