The demons of the underground world are strange and mysterious beings. The underground demon world of 3000 worlds is connected in a sense. In fact, the 3000-year-old world has found the right pulse, and it is also open.

But generally speaking, there are only a few entrances into the underground world. That is to say, the Yuqing world is an entrance, and the Western kingdom is also an entrance. There are also entrances to other worlds, but apparently there are no such entrances in the vast world.

In a world with entries, great masters set boundaries to keep demons from coming out. This is a maintenance of the normal world...