The stone Bridge of Troubled Water at Fengdu Ghost City (fig.) was built during the Ming Dynasty to allow visitors to test themselves for being Good or Evil by crossing the middle arch of this bridge (fig.).

The bridge, also known as the Bridge of Helplessness and the Bridge of No Return (fig.), is guarded by demons (fig.), who either allow or forbid passage. The souls of the kind and benevolent dead are allowed to pass and are guided across by Bai Wu Chang (fig.), a servant of Diyu, whereas the souls of the evil and wicked people will be pushed into the water below, known as the Lake of the Doomed.