The first four sentences describe the tragic scene and decline scene of Chang' an in spring, implying the feeling of ups and downs; The last four sentences are full of feelings of missing relatives and mourning for state affairs, full of poverty and pain. The change from beginning to end expresses a kind of anxiety and melancholy, which makes people think of his environment and feel his inner feelings.
"The country is broken" and "the vegetation is deep" write the present scene of Chang 'an. Everything grows in spring, but now it is so depressed. The sense of loss and gap makes people feel carefree. Feeling for Time and Parting Difficult express Du Fu's sad thoughts because of injury, and express their feelings with scenery.
The war between "bonfire" and "Wanjin" constantly makes the author worry about the country and the people, and also explains why a letter from home is better than Wanjin. It reflects the people's good desire to oppose war and look forward to peace, and it is inevitable to sing with the author. The more "white hair" troubles, the more "scratching" to relieve troubles. From your own state, express your feelings of wanting peace and missing your family.
Lyric with scenery, scene blending, deep feelings, concise. Scenery description from far to near, feelings from light to strong, feelings and scenery cross each other, giving people a strong sense of fluctuation. People can't help feeling that the wars in those days continued and people's lives were in dire straits, reflecting the desire of contemporary people to love the motherland and yearn for peace. It also expresses the poet's feelings of worrying about the country, the people and the world.