[ Ah! It was that sort of set up. ]

The world this one resided in had no such setup. There is the human world, and the demonic world, and an abyss between. There are places where the border is thin and one can travel back and forth, but that is about it. Demons have different cultivation. The human world has four major cultivation sects, though many many smaller ones. Cang Qiong Mountain is one of the four.