This is a five-character poem, written in the second year of Tang Suzong to Germany (757). Chang 'an at that time was burned and plundered by the Anshi Rebellion, and it was desolate everywhere. Du Fu saw that the mountains and rivers were still destroyed and the land was desolate in spring. At this time of homesickness in adversity, he couldn't help feeling deep sorrow and emotion. The poet expressed patriotism in this poem. The central idea of this poem is: this poem has passed. It expresses the poet's feelings of worrying about the country and homesickness, and reflects the poet's desire for peace and happiness. The whole poem expresses the poet's feelings of worrying about the country, hurting the time, feeling sorry for himself and missing his loved ones.