After Little White and Black King left Cangwu Mountain, they traversed mountains and ridges, crossing through wild forests.
Without a teleportation formation, it took them half a year to return to the Human-Demon frontier line.
This boundary line is actually quite ambiguous.
At its center is the Bridgehead Fort Ancient Plains Mountain Range, where the Human Clan advanced into the Million Mountains years ago. To the south are the once-conquered and later reclaimed Howling Mountain Range, and to the west lies the Yu Ding Realm.
Especially the Yu Ding Realm, which now encompasses a much larger area than it used to.
This place has turned into a realm of ghosts!
Within it, countless resentful souls and fierce ghosts abound, with a powerful Fourth-Order Ghost Emperor maintaining order.
Because of the Ghost Emperor's presence, it became a natural dividing line that neither humans nor demons would easily cross.
