There is a Mengpo Village in the underworld, and Mengpo is the owner of Mengpo Village, who is responsible for erasing the memories of living souls.
I am a Yin official in Meng Po Village, and it is my job to make living souls drink Meng Po soup. This is both difficult and easy. What is easy is that most living souls are willing to let go of everything and enter reincarnation. What is difficult is that if the living souls do not want to enter reincarnation, I have to go to the mortal world and untie those knots in my heart.