Snake Coffin Beauty

My name is Xu Hanchan and I was born on the 15th day of the seventh lunar month, which is also the Hungry Ghost Festival. On the day my mother gave birth to me, there was a flood in the village. My mother was so frightened that she started to work early, and I was born a month early. My third uncle held me and looked at me carefully for a long time before giving me a name. It wasn't until I grew up that I learned an idiom called "jade in the shape of a cicada". Only then did I realize that [Han Cicada] was the piece of jade in the dead man's mouth. And the contract between humans was already destined from the day I was born...