Recumbent fairy grass , also known as procumbent fairy grass, procumbent fairy grass. , which first appeared in China Institute of Medicinal Plants, contains a variety of trace elements beneficial to human body. According to Compendium of Materia Medica, Cao Xian is warm in nature, nonflammable, astringent in taste, sweet in taste, and cold in nature, and has the effects of relieving summer heat, quenching thirst, clearing away lung-heat, resolving phlegm, inducing diuresis, clearing heat and detoxifying. It can treat heatstroke, thirst, hypertension, muscle and joint pain ... it is a crop with medical characteristics.