"Poison Doctor's Favorite Concubine: Your Highness, Too Black-bellied" and "The Phoenix Returning to the Court: The Defiant Useless Eldest Miss" were two novels about the female lead transmigrating into a fat woman and becoming the crown prince's concubine. I suggest that you read these two books first, or give me more information about your preferences so that I can more accurately recommend other novels for you. I hope you like my recommendation. Muah ~