"Luo Shen Fu" was originally called "Gan Juan Fu". It is generally believed that it was named this because Cao Zhi was named the King of Juancheng. However, "鄄" refers to "Zhen", and Cao Zhi's nephew Feeling that it offended his mother's name, he changed it to "Luo Shen Fu".
Luoshen refers to Mi Fei, the daughter of the Fuxi clan. She was called Luoshen because she drowned in Luoshui. The Luo Shen Fu was actually written by Cao Zhi when he saw a beautiful girl in Luochuan on his way back to the capital and regarded her as the Luo Shen.
As for the uncle-sister-sister relationship between Zhen Ji and Cao Zhi written in some unofficial history, our teacher said that it cannot be believed at all, and it is most likely that they were created by later generations.