What is "Jian 'an Style"? Take Cao Cao's short songs as an example to analyze.

It refers to the poetic style of Cao Shi's father and son, Jian 'an Seven Sons and others in the Han and Wei Dynasties. Cao Cao, Cao Pi, Cao Zhi, Kong Rong, Chen Lin, RoyceWong, Xu Gan, Ruan Yu, Angelababy, Serina Liu, among them, Cao Cao's poems are profound and magnificent, such as his short poems, which are full of flowers. This article expresses the poet's longing for beauty and ambition to unify the world through the singing at the banquet. The first few lines of the poem,,,, are all songs about wine. The geometry of life,,, and how to solve worries, only Du Kang. . To express Cao Cao's sorrow, no sage helped him make contributions. Generally speaking, this poem uses allusions and metaphors to write personal aspirations, with great boldness of vision and deep feelings.