Mulan Ci is a famous folk song in the Northern Dynasties, also known as Mulan Ci, which is selected from Yuefu poems compiled by Guo Maoqian in the Song Dynasty. In the history of China literature, Mulan Poetry tells the story of a girl named Mulan disguised as a man and joined the army for her father. After returning to North Korea, she refused to be an official and just wanted to go home.