What does the fortune teller mean when he says that my girlfriend is a fairy and she is going to the Jinghai to come back to life?

There seems to be such a saying, because my sisters used to be immortals in my dormitory. She told us that her parents took her to change it when she was a child, but I don't know exactly how to change it. It's like a ceremony, which means it's not good for a fairy to get married or something. She is from Dagang. Besides, we all think she is really something. Hehe ~ ~ Believe it or not, you'd better be careful. There are many things in the world that we can't explain, and we can't just say it's superstition.