There is a river in the underworld named Wangchuan. There is a bridge named Naihe on the Wangchuan. There is a mother-in-law named Mengpo on Naihe.
Meng Po has been cooking a pot of soup on the bridge for thousands of years. It is Meng Po soup that can make ghosts forget everything. The world also calls it forgetfulness water. After drinking it, everything in the previous life will disappear with this bowl of water, and you can just reincarnate as a human being with peace of mind.
On one side of the Forgotten River, there are many ghosts on the bank who keep picking up lamps from the river and then put them back into the river silently. Why do they keep picking up the lamps?
Those lamps are full of names, but only one is written with the name of the person who is fishing for the lantern. If you find the lamp with your own name written on it, you can use that lamp to light your way home, and you can take another look at the person you can't let go of most in the mortal world.