What does desire have to do with fetal spirit?

Father-son relationship. In God Bless the People, it tells the story of Yue Xian Prince Xie Lian's failure to ascend to heaven twice in a row. Yue Xian's prediction calculated that his rise would be disastrous. In order to avoid Xie Lian's pain, Buddhism reduced him to a mortal. After Xie Lian climbed the mountain for the third time, he met Wang Huacheng in the mortal world, and his father and son traveled the rivers and lakes together.