An Lingrong's Rebirth as Empress with Peerless Elegance

Why do I feel a little confused? Isn't she a concubine? Why are you still called Roubi? Never changed?

Author, if you don't want to make An Lingrong a concubine, don't make someone else a concubine. The decree is just to directly call her a concubine, which is nothing like the heroine. The title "concubine" can also appear during the canonization ceremony...