There were novels such as "The Confused Empress Dowager: Entering the Emperor's Nest","The Evil Emperor's Favorite: The Ugly Concubine","The Empress is Too Powerful: The Emperor's Horse is All Floating Clouds","The Empress Is Above, I Am Below","The Empress Has a Dream Space", and so on. They were all about the transmigration of emperors and empresses. I hope you like this fairy's recommendation. Muah ~๐