What do you mean, a cloud and a dream?

This is just a beautiful dream, but it can't escape the entanglement of reality. According to relevant public information, this sentence comes from a poem named Cloud Dream written by Su Shi, a poet in the Southern Song Dynasty. The content of the poem is like this: Come and put on colorful clothes, climb high and look far, your hometown, the desert is nine thousand miles away, and the maple leaves are fragrant. The landscape is picturesque, like water flowing relentlessly, like a cloud of smoke and a dream, and there is only melancholy Man Tangchun.