About the poems of Yueyang Tower, talk about the feelings expressed by the author?

Du Fu, The Story of Climbing Yueyang Tower

I heard that Dongting Lake is magnificent before, but today's wish has finally reached Yueyang Tower.

The vast lake tore Wu Chu apart, as if the sun, moon and stars were floating in the water.

There is no news from my friends or relatives. I am old and sick, drifting in a boat.

The battle of the north gate began again, and I cried through the railing.

This poem is the masterpiece of the five laws in Du Fu's poems, and it was called the first of the five laws in the prosperous Tang Dynasty. On the whole, the grandeur of mountains and rivers and the breadth of the poet's mind are both inside and outside the poem. Although sad, but not depressed; Although depressed, but not depressed.