What feelings did Su Shi express in "Hunting in Jiangchengzi Mizhou"? If it is used as composition material, what topic is it suitable for?

It expresses Su Shi's feeling that he is full of ambition, but he can't serve the country. He has been idle at the grassroots level for a long time and can't realize his ideal ambition. This paper uses the story of Emperor Wu of Han Dynasty re-enabling Shang Wei, the satrap in the cloud, to lament that in order to realize his ambition, the Song Dynasty sent envoys like Feng Tang to activate himself.