What are the lyrical features of Gusu's homesick poems?

The couplet takes care of the beginning of the article, expressing the poet's ruthless and natural feelings for history. "Loyal minister" refers to Wu Zixu, wuyue War, when Fu Cha was defeated by Yue, Gou Jian made peace, and Zi admonished the king of Wu, but the king of Wu, Fu Cha, refused to accept his uncle's slanderers, forcing Zi Xu to commit suicide and abandon his body in the river. Later, the State of Yue really defeated Wu. The "pity" sentence is the poet's lament for Wu Zixu's tragic fate. In the face of the rolling river, Confucius once felt that "the deceased is like a husband, staying up all night." With strong winds and sails, the river flowed eastward in the turbulent Bai Bo and disappeared into the sky. Life is short, history is ruthless and nature is eternal, which makes the poet think a lot.