The underworld and the yang world are actually two sides of the same body. When people die, they go to the underworld, and when ghosts are reincarnated, they go to the human world. The soul just keeps transforming between these two realms.
So, after reincarnation, is the person in this life still the same person as in the previous life?
Intention: One life will return to another, and the next life will be different.