Asparagus has the functions of warming stomach, moistening intestine, relieving cough and diuresis, and has certain adjuvant therapeutic effects on hypertension, arteriosclerosis, heart disease, diabetes, cystitis, acute and chronic hepatitis and liver cirrhosis. Compendium of Materia Medica records that asparagus can "clear away heat and promote diuresis"; The root is called Stemona, which can moisten the lungs, relieve cough, eliminate phlegm and kill insects.