How did Du Fu write about the scenery on Yueyang Tower? What are the characteristics of Dongting Lake?

The first four sentences of this poem directly describe the magnificence of Dongting Lake from the front with majestic momentum and exaggerated techniques, which gives people a strong impact and shock.

Judging from the whole poem, Du Fu's poems have the momentum of embracing the universe and devouring the sea, and lyricism has the effect of making people cry. From the majestic front to the sad back, it embodies the characteristics of Du Fu's poems. "The poetic realm is wide and narrow, and the conclusion is extremely difficult to gather" (Huang Baishan dialect), and the evaluation is extremely pertinent.