In Naiyan of Badu Town stands a cylindrical boulder with a diameter of 3 to 4 metres. Its exposed section stretches 25 metres long, resembling the keel of a giant dragon. Local residents name it Dragon King Stone, also known as the Backbone of the Earth.
After multiple on-site investigations conducted by Guizhou geological experts and officials from the Provincial Tourism Promotion Association, it has been confirmed that this is a geological wonder formed by massive crustal movement. This unique geological phenomenon is one of a kind in the world, boasting high value for archaeological research, scientific study and tourism.