What is called "Shuang Bao" in the history of China's ancient poetry?

In the history of ancient poetry in China, Peacock Flying Southeast and Mulan Poetry are two famous poems. These two poems are long narrative poems, which have profound social and ideological significance and high artistic achievements, and are highly praised by scholars in past dynasties.

Peacock Flying Southeast is the pinnacle of Yuefu poetry history. The original title was "Ancient Poems for Jiao Zhongqing's Wife", and it was named because the first sentence of the poem was "Peacock flies southeast and wanders in five miles".

The story is simple, well-tailored, and the characters are vivid, which not only shapes the image of Liu Jiao and his wife as soul mates and unyielding, but also depicts Jiao Mu's stubbornness and Liu Xiong's arrogance. At last, the article conceives the myth that both Liu Lanzhi and Jiao Zhongqing became peacocks after their death, and places people's strong desire to pursue love freedom and a happy life.

Mulan Poetry is a long narrative folk song in northern China during the Southern and Northern Dynasties, and it is also a Yuefu poem. It tells the story of Mulan disguised as a man, joined the army instead of her father, fought in the battlefield, returned to the DPRK in triumph, made meritorious deeds, and resigned and returned to China, which is full of legend.

Mulan's image is the embodiment of people's ideal. She embodies the excellent qualities of the Chinese nation, such as diligence, kindness, wit, courage, perseverance and simplicity. Is deeply rooted in the vast land of northern China, a heroic image with flesh and blood and human feelings, which is especially valuable in feudal society where men are superior to women.