Hidden Veins seem to have been sparse in number since ancient times, and have no intersection with normal human society. If the only intersection is with Daji in the Shang Dynasty, Hidden Veins are also called blockers. Blockers are what demons call them. What is a demon? An existence separated from the real society due to the spiritual veins of heaven and earth, because those who disrupt the order of heaven and earth and become monsters must experience a catastrophe, and there is no way to hide. If they are lucky enough to survive, they can turn into humans after many years. The hidden veins are those who kill the remaining monsters after the catastrophe.
Intention: Nothing is perfect in this world