According to the purple smoke poem

The censer peak produces a purple mist under the sunlight. From a distance, the waterfall looks like white silk hanging in front of the mountain. There seem to be several waterfalls in thousands of feet on the high cliff, which makes people suspect that the Milky Way fell from the sky to the ground.

This poem vividly depicts the magnificent scenery of Lushan Waterfall and reflects the poet's infinite love for the great rivers and mountains of the motherland. The first sentence is "Purple smoke from the Rizhao incense burner". "Incense burner" refers to the incense burner peak of Lushan Mountain. This peak is in the northwest of Lushan Mountain, with a sharp and round shape, like a censer. Because of the waterfall, water vapor transpiration, in the bright sunshine, as if there is an indomitable spirit incense burner, purple smoke rises in Ran Ran.

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The towering incense burner peak is hidden in the clouds. Looking at the waterfall in the distance is like flying down from the clouds and falling in the sky, which naturally associates with a galaxy falling from the sky. It can be seen that although the metaphor of "doubt is the milky way for nine days" is strange, it does not appear out of thin air in the poem, but naturally emerges from the portrayal of the image.

This poem is very successful in metaphor, exaggeration and imagination, with unique conception, vivid language and bright washing. Su Dongpo appreciates this poem very much, saying that "the emperor sent the Milky Way to fall into the pulse, and there were fallen immortals in ancient times." The "immortal" is Li Bai. Looking at Lushan Waterfall is indeed an example of body description and lyricism.