Looking at Dongting Lake was a poem written by Liu Yuxi, a poet of the Tang Dynasty. It mainly described the beautiful scenery of Dongting Lake and the author's feelings. The first sentence of the poem,"The lake and the autumn moon are in harmony", expressed the author's praise for nature by describing the lake surface, sky, clouds and other scenery of Dongting Lake. In the poem, Liu Yuxi began with the word "Wang" and brought the readers into a magnificent landscape painting by looking at Dongting Lake. The poem wrote: "The lake and the moon are two, and the pool surface is windless and the mirror is not polished. Through this vivid description, the author presents the beautiful scenery of Dongting Lake in front of the readers. This poem expressed the author's praise for nature and also expressed the author's perception of life. Through describing the beautiful scenery of Dongting Lake, the author expressed his awe and praise for nature, and at the same time, he had a deeper understanding of the short-term and impermanence of life. The whole poem was sincere and profound, and it became a classic of Chinese classical poetry.