The famous line in this poem is: Wu Chu is in the southeast, and the universe floats day and night.

Appreciation: "Wu Chu is in the southeast, and the universe floats day and night." Although the word water does not appear in these two sentences, they are specifically about Dongting water. The poet stood on the Yueyang Tower and looked toward the southeast. He saw Dongting Lake, a vast expanse of water that could not be seen to the end, while the land of Wu was pushed far to the east, and the land of Chu was pushed far to the west and south. . This scene is like the water of Dongting Lake extending to the southeast, dividing the Wu and Chu lands that were originally connected into two parts. The word "卼" is used very well and has a sense of dynamics. It was as if the lake was extending and the earth was being cut open. The last sentence "Qiankun" refers to heaven and earth, including all things in heaven and earth. "The universe floats day and night" means that the poet stood on the Yueyang Tower and looked around. There was endless Dongting water everywhere, as if the entire world was floating on the water of Dongting Lake. It seemed as if everything in the world was floating on the water of Dongting Lake day and night. .