What role did Bao Zhao play in expressing the theme of the poem by imitating the ending sentence of six sentences in Difficult to Go to Heaven?

These two poems ostensibly refer to the poverty of ancient sages to laugh at themselves. In essence, they expand and deepen personal frustration to the whole historical level-it is not an individual phenomenon, but has existed since ancient times, even great sages are inevitable, which is enough to prove the irrationality of real life itself. Therefore, the theme of the poem has risen from expressing personal frustration to exposing and accusing the injustice of the times, which is a significant sublimation. It can also be noted that the word "solitary and straight" is used at the end of the poem, which specifically points out the social roots of the ups and downs and sufferings of people with lofty ideals like the author.