People who are familiar with ghosts, if they enter reincarnation, will take a tortuous road, travel more than ten miles, reach a water area, not counting a few feet wide, and flow southwest. The so-called Nai River in this custom originates from the underworld, and its water is full of blood, but it is fishy and dirty. Because there is a bridge over the river, it is named "Naihe Bridge". The bridge is narrow and flat, guarded by people who walk day and night. The river of blood under the bridge is full of insects and snakes.