This poem expresses farewell to friends through the description of weeds in the ancient plain. It can be seen as an ode to weeds, and then an ode to life. The first four sentences focus on the diachronic beauty of Life of Weeds, and the last four sentences focus on the diachronic beauty of Life of Weeds. The whole poem is rigorous in composition, natural and fluent in language, neat in antithesis and muddy in artistic conception, which is the swan song of "suitable fu"