The famous long Yuefu poem in Chinese in medieval Vietnam is

The poem is "The Song of the Wives".

This poem describes the story of a woman who lost her husband during the war, fled with her children during the war, and finally committed suicide in despair.

The poem expresses deep sympathy for war and suffering, and also reveals the cruel devastation of war on ordinary people.

This poem plays an important role in the history of Vietnamese literature and is known as one of its representative works of Chinese literature.