What is Cao Cao in Jian 'an literary world? What is the idiom of his patent application in Yuefu poems?

Cao Cao is the leader of Jian 'an literary world.

One of the great achievements of Cao Cao's poetry creation is to create a prosperous situation of literati's "quasi-Yuefu" poetry creation

Write new things with ancient inscriptions, such as Autumn Record and Haoli. The old poems of Yuefu are elegies, but Cao Cao used a sad tone. 2. The unique artistic style with heavy sadness. His poems can especially express his personality, with the great boldness of vision of a political leader, simple and lyrical nature, showing his great ambition, firm confidence, outstanding perseverance and majestic momentum, and his elegy is generous and full of charm.