Yellow River Night Boat

My grandfather said something strange to me before he died: "Never fish for anything in the river." I didn't listen. The next day I fished a corpse out of the Yellow River and it smiled at me. From that day on, I realized that generations of the Shen family were not fishing out dead people, but guarding something more terrifying for the Yellow River. Every rule of the Shen family is written in the river crossing book, but the more I read the rules, the more strange they become: Why do every generation of people crossing the river never live past forty? Why are the dragons under the Yellow River waiting for me to "cross" it? The lies told by the three families for eight hundred years, the dragon does not want to die and wants to return to the abyss, the heart of the Yellow River eats one Shen family member every year... Okay, then I will change all the rules.