I Was Sacrificed at the Beginning, so I Could Only Use My Sister's Body.

The breeze comes slowly, and there is something to say. My name is Xu Yougao, you can also call me Xu Yougao, because my sister's surname is Xu. I don't know why I seemed to be stabbed in the back by my mother in this life, and she sacrificed me to my sister. What she doesn't know is that I have a system. Although I was sacrificed, I only lost my body, but I could still use my sister's body. (Because my writing style is so poor, I write whatever comes to mind)