The moss and mangroves under the steps are sparse in the rain and melancholy in the moonlight.
The three or four lines of the poem use the technique of borrowing scenery to express emotions, depicting the desolate and desolate atmosphere after the lingering and desolate autumn rain, when the moss and mangroves in the courtyard are silently facing each other, and the poet is alone, speechless to the moon. . The poem uses strong color contrast, which is in sharp contrast with the plain whiteness and desolation of autumn rainy evenings, which further highlights the poet's loneliness and depression when he is alone and far away from his hometown, as well as his strong longing for his hometown and family.