What kind of mood and feelings did the short ballad express for Cao Cao?

Cao Cao was an outstanding politician, strategist and writer at the end of Han Dynasty. He is elegant in poetry and is good at writing Yuefu poems. There are 22 poems today, all of which are Yuefu poems. Cao Cao's Yuefu poems mostly describe his own political opinions and ambitions to unify the whole country. For example, his short songs fully express the poet's desire for virtue and his ambition to unify the world. Short songs are "old songs of Han dynasty" (the ancient words of Song Dynasty are lost. Yue Fuming thinks that short songs are relative to Long song, and "Long song" and "short songs" are based on the length of songs. Cao Cao's Poems of Yuefu recorded two songs, which is the first one. At the beginning of the poem, he expressed his deep feelings about the passage of time. Then, he expressed his desire through the description of missing talents and banquets. Finally, he expressed his grand ideal of recruiting talented people to complete the great cause of reunification with Zhou Gong's allusions. The whole poem uses allusions and idioms to express his arms, such as the words in the Book of Songs and the meanings in Guanzi and Biography of Korean Poetry, all of which are just right and integrated. It is concrete and appropriate to take "bright as the moon" as a metaphor, Goldman Sachs as a virtuous person, and mountains and seas as a metaphor. The more talents you can recruit, the better. His poems inherited the tradition of Han Yuefu, which not only reflected the reality, but also had deep feelings. The language is simple and natural, and there are impassioned positive emotions in deep melancholy, just as Zhong Rong said in "Poetry": "Cao Gong is straightforward and deeply impressed. It mainly served the political line, policies and strategies implemented by Cao Cao at that time, but the author completely integrated the political content and significance into the rich lyrical artistic conception. The whole poem gives full play to the specialty of poetry creation, and uses metaphor accurately and skillfully to understand and empathize. This poem has made great achievements in ideological content and art, with simple language, far-reaching conception and abundant momentum. This poem is based on "ambition is deeper than long" in the Jian' an era, and it is full of gas.