Ephedrine is a poem in The Book of Songs, the first collection of poems in ancient China. This is a cheerful song of labor, a ballad sung by people when picking slugs (that is, plantains). The whole poem consists of three chapters, and each chapter has four sentences, all of which are repeated sentences. Only a few verbs have changed, and the rest have not. It repeatedly shows the process of labor, and the results of labor are shown from less to more, full of joy and enthusiasm of labor.