Bai Juyi's "Baiyun Spring": "Baiyun Spring is on Tianping Mountain, and there is no water in the clouds. Why rush down the mountain and add waves to the world! " Poets use symbolic techniques to write scenes and express their ambitions, and use the leisurely nature of clouds and water to compare the peace of mind and the carefree mood. The natural waves aroused by the spring water symbolize the social storm, which is simple, profound and interesting. From this poem, we can see that the lyric hero of this poem is an official who is indifferent, carefree, eager to get rid of secular affairs and has the idea of retiring. This ideology of the poet runs through the whole poem. On the surface, the poet wrote that white clouds are floating in the wind, rolling freely, hanging freely, flowing freely and enjoying themselves calmly. This is actually the poet's inner monologue. The sentence "Why" expresses the poet's character.