Duan Yuanfei (段元妃) (died 396), formally Empress Cheng'ai (成哀皇后, literally "the successful and lamentable empress"), was an empress of the Xianbei-led Chinese Later Yan dynasty. Her husband was the state's founding emperor, Murong Chui (Emperor Wucheng). Her given name is lost to history, but her courtesy name Yuanfei was recorded. She was the niece of two of Murong Chui's prior wives, who were daughters of the Xianbei chief Duan Mopei (段末怌). Her father Duan Yi (段儀) was a brother of the Princesses Duan.