"Yuefu Shuangbi" refers to "Mulan Poetry" and

Mulan Poem by Peacock in the Southern and Northern Dynasties and Mulan Poem by Peacock in the Han Dynasty are both called "Yuefu and Narrative Poem", which are a long narrative folk song and Yuefu poem in northern China during the Southern and Northern Dynasties. Also known as Mulan Ci, it is selected from Yuefu poems edited by Guo Maoqian in the Song Dynasty, and it is called "Yuefu Double Treasure" together with Peacock Flying Southeast in the history of China literature. Mulan Poetry tells the story of a girl named Mulan who disguised herself as a man, joined the army for her father, made meritorious deeds on the battlefield, refused to be an official after returning to North Korea, and just wanted to go home and reunite.