Old Devil Yu ultimately changed his mind and quietly left the Breeze Inn.
...
Three-Path River.
One of the forbidden areas in this world.
Legend has it that the "Three-Path River" is the dividing line between the world of the living and the world of the dead. The water flow would divide into slow, normal, and fast speeds based on the deceased's past actions, hence the name "Three-Path".
There is only one way to cross the "Three-Path River": by boarding the ferry on the "Three-Path River". Other than that, there is no other way.
And the fare is the soul!
In other words, this river theoretically does not ferry the living.
Because of the unique nature of the "Three-Path River", it naturally serves as a protective barrier for the Netherworld Sect.
To cross the "Three-Path River" is to reach the Netherworld Sect.