It means: According to legend, after passing the gate of hell, there is a road called Huangquan Road. On the road, there are only flowers but no leaves in bloom. The flowers and leaves are missing, and we miss each other and cherish each other forever. At the end of the road, there is a river called Wangchuan River, and there is a bridge on the river called Naihe Bridge. After passing Naihe Bridge, there is an earthen platform called Wangxiang Platform. There is a pavilion next to Wangxiang Terrace called Meng Po Pavilion, and a woman named Meng Po is waiting there, handing a bowl of Meng Po soup to every passerby. There is a stone by the Wangchuan River called Sansheng Stone. Drinking Meng Po soup makes people forget everything. The three life stones record the past, present and next lives. Walking across Naihe Bridge, taking one last look at the human world on Wangxiang Terrace, drinking a cup of Wangchuan water to cook this life.
Extended information:
Naihe Bridge: Naihe Bridge is a place where people are given reincarnation in Chinese Taoism and Chinese folk mythology. Here there will be an elder named Meng Po. The female deity gives each ghost a bowl of Mengpo soup to forget the memories of the past life so that he can be reincarnated into the next life.
Meng Po Soup: "Meng Po Soup" is an ancient Chinese legend, which is recorded in an ancient book of Lanzi's family. In that legend, people are reincarnated from life to life. The end of this life is just the beginning of the next. People who cycle from life to life cannot have the memory of the past life, just because everyone will drink Meng Po soup on the Naihe Bridge before reincarnation, which makes them forget their past lives.
So, walking on the Naihe Bridge is the last time a person has memories of this life. At this moment, many people are still clinging to their unfinished wishes from the previous life, but they deeply understand that these wishes will not be realized in the end, so they will let out a long sigh. This is also the reason why this bridge connecting the reincarnations of various lives is named Naihe Bridge.
Reference: Baidu Encyclopedia_Naihe Bridge