Meng Po, a figure in ancient myths and legends, lives in Naihe Bridge. She provides Meng Po Tang for all souls who are reincarnated to erase the ghost's memory.
According to the ancient legend in China, Meng Po is the female emissary who is responsible for erasing the soul memory of the living in the underworld. There are usually three theories about the origin of Meng Po.
Extended data
Legend of Meng Po: When the HarmonyOS system was first opened, the world was divided into three realms: heaven and earth, and heaven was in charge of everything. This world is the so-called Yang world, and the earth is the underworld. The boundary of the three realms, whether in heaven or in the earth, the immortal and the yin official, each performs their duties. Meng Po was already on earth when he left the Three Realms. She used to be a scattered official in heaven.
Later, because I saw countless grievances and hostilities in the world, I refused to let go even if I died. I came to the Forgotten River in the underworld, set up a cauldron at the bridgehead of Naihe Bridge, and refined the lingering thoughts of the world into Meng Po soup for ghosts to drink, thus forgetting the love and hate before my death, unloading the burden before my death and entering the next reincarnation.
This statement first appeared in Taoist classics in the Spring and Autumn Period. In China's traditional thought, it means "people die like clouds", "die once" and "don't remember the kindness of the dead".
Baidu Encyclopedia-Meng Po