It means on the other side of the forgotten river. In fairy tales, there is a river under Naihe Bridge, called Forgetting River. The river is full of ghosts, wronged ghosts and so on. On both sides of the river are flowers on the other side, and flowers and leaves never meet. The flowers on the other side are red, just like blood, which is daunting. Stand on this side of the forgotten river and look over, and that side is the other side.
Specific meaning:
After the death of their lover, they miss each other on the way across the flower on the other side (a flower that can awaken the memory of the deceased). In the reincarnation of hell, a woman remembers all kinds of things with her husband before she died. She is unwilling to let go of her previous marriage and keeps crying on the road, but no one cares about such things. At this time, the man is willing to become a monk and put down his obsession and concerns to influence the Buddha.
Let the hostess go through the reincarnation smoothly, and hope that the Buddha can help her cross the forgotten river. (Forgotten River is said to be between Huang Quan Road and Hades Road, separated by Forgotten River. There is a Naihe bridge on the Forgotten River, and an old woman sits beside it. Her name is Meng Po. If you want to cross the forgotten river, you must cross the Naihe Bridge. You must drink Meng Po Tang to forget the past. You can't cross the Naihe Bridge without drinking Meng Po Tang.
Avoid kicking down the ladder and forget each other's love. So the man knelt in front of the Buddha for thousands of years, but the Buddha didn't feel sorry for him at all, so the man volunteered to jump into the forgotten river and suffer from reincarnation, reducing the pain of the woman.
Every time the woman crosses the bridge, the man will suffer under the bridge, but the woman doesn't know this after drinking Meng Po Tang, so the man will watch her cross the bridge every time, so the man hopes that she can turn back every time she crosses the bridge.