What is the content of this poem and what kind of emotion is expressed?

A Line of Short Songs belongs to Xiang He Qu Ping Diao Qu of Yuefu. There are two short songs by Cao Cao, and this is the first one. This article expresses the poet's desire for virtue and ambition to unify the world through the singing of banquets. The whole poem is divided into four sections, the first eight of which are the first section. Life is limited, and poets can't get many talented people to cooperate, so they can seize the time to make contributions together. The last eight sentences are the second verse. The poet quoted the Book of Songs twice to express his thoughts of seeking the virtuous: once he pondered what he could not get, and once he gave a banquet to entertain him. Again, eight sentences are the third quarter. The first four sentences are about sadness, and the last four sentences envisage the arrival of talents, taking care of the first two sections respectively. The last eight sentences are the fourth quarter. First, use situations to motivate talents and let them choose well and live. After that, I got up my courage and said that I could accommodate talented people and bring the world back to my heart. ? "When drinking songs, life geometry? For example, Chaolu is much more difficult to go to Japan. " Sadness is not an expression of the idea of eating, drinking and having fun in time, but is closely related to the poet's failure to seek virtue and success. Writers in Jian 'an period often felt that life was too short to make contributions in time, as did Cao Cao and his son Cao Zhi. Cao Zhi's "Seeking the Self-test Form" said: "I am often afraid to show my body first and fill the ravine, so that my grave is not dry." Another example. This poem is about three times of sadness. In Cao Cao's Autumn Hu Xing, it says, "No matter about the future, the world is easy to govern." The passage of time is not too sad, what is worrying is that the world is not peaceful. Therefore, the artistic conception of this poem is boundless and sad, but the poet's mood is not low and weak, and the performance is still the spirit of striving for progress. ? Since ancient times, people have lamented that time is fleeting and life is easy to get old. Some sigh because of the years, "I don't know how old"; Some sigh because they don't enjoy wealth and prosperity; There are also people who are disappointed because of greed and fear of death. Cao Cao's "Short Songs" also lamented the brevity of time and the geometry of life. However, after reading the whole biography, we will think that the author expresses this feeling because he feels that he is getting older (54 years old) and shallower. At present, the great cause has not been accomplished, and it is extremely rare to save the world. It is a sense of urgency and anxiety. It is because of this kind of thinking that we warmly treat those condescending people who appoint "crossing the street" and "talking about banquets"; For those wise men who are still circling the tree three times, they shout out that "the mountain will never be too high and the sea will never be too deep", showing their thirst for wisdom. This poem shows us the heroic quality of Cao Cao as a generation of politicians from another side: he has a politician's loving and virtuous mind; He has great ambition to unify the world; He has the enterprising spirit of opening up new fields. This poem by Cao Cao is magnificent and full of emotion. Read Qingqing, leisurely in my heart. But for the sake of the monarch, I have been thinking about it so far. ""It seems like a month. When can you wait? The troubles come from this and cannot be cut off. "Such a poem, you will strongly feel the author's thirst for talent; Read "The mountain will never be too high, and the sea will never be too deep. The duke of Zhou vomited, and the world returned to the heart. "You will feel the poet's broad and open mind. And this kind of poem can only be sung by a talented and unrestrained person like Cao Cao. Short Songs is one of Cao Cao's representative works, which expresses the author's great ambition and broad mind to recruit talents and help him unify the world. According to historical facts and the contents of the poem, this poem is considered to be the key to the reunification of Battle of Red Cliffs in the 13th year of Cao Cao's Jian 'an (208). Although he failed in this election, he was not discouraged. Only by constantly recruiting talented people can we strengthen our political, economic and military forces and make progress. The author ingeniously uses the sentence of cherishing peace in The Book of Songs, turning the singing of young women waiting for their lovers into the words of entrepreneurs longing for talents, and expressing the urgent mood of recruiting talents through the singing of guests attending the banquet. The whole article expresses emotions around the word "worry". The first two sentences are the causes of "worry", while the last two sentences express the desire to eradicate "worry". The four homonyms of "Clearly as the Moon" have profound implications. The four sentences of "the moon stars are rare" are very appropriate. Black magpies fly at night, and wise men embrace themselves in a turbulent society. At this time, narration, scenery writing, reasoning, lyricism and melting together can complement each other. Love is born from the scene, rational, hidden and quiet. The whole rhyme is powerful, and the rhyme or eight sentences change and four sentences change. The language is simple and natural, swaying, patchwork and clear-cut, which can give readers endless aesthetic enjoyment.