Talk about several kinds of sadness of the poet in this poem. What does the poet care most about?

The poem Pavilion Night by Du Fu is full of emotion. Tell me about this poem, which describes several kinds of sadness of the poet. What is the poet's saddest thing?

This poem describes the poet's various sorrows. "The day in winter is shortened on the elemental scale" expresses the poet's feeling that time flies and life is short. "The frosty night at the end of the world" expresses the poet's sadness that he lives at the end of the world, and couplets and necklaces express the poet's regret that the people are tired because of the war. "Wolong, Pegasus, are not generals now, they are dust" expresses the poet's sadness about the eternity of the universe and the impermanence of life. "Oh, the noise of the world, be quiet for a while." Expressed the poet's old illness and loneliness.

The poet's saddest thing is the suffering of the people in the war. When we read "I heard a woman in the distance, wailing after the battle", it seems that the poet also shed tears of concern.