First of all, according to the poem you provided, "The smoke on the cliff is about to be collected. You can listen to birds and watch waterfalls at the head of the village." Described a scene, that is, the cliff is shrouded in mist, and the poet came to the head of the village, listening to the song of the oriole and watching the waterfall.
The next verse, "I don't know if it rains at night, Xiao Qingxi's flowers are surging." It depicts how the rain at night affects the scene of the stream in the morning. The poet may be surprised by the rain all night, because the stream becomes full of vitality in the morning, the stream gurgles and the petals drift with the water, forming a vivid picture.
Generally speaking, this poem depicts the beauty of nature that the author saw and felt in the early morning. Poetry is beautiful and full of artistic conception, expressing the poet's love for nature and concern for the details of life.