Function:The ancient Chinese medical book Compendium of Materia medica wrote:It is beneficial to qi and eliminating phlegm, warm body and get rid of the cold, relieving collaterals and pain. Treatment of phlegm cough and asthma, chest and flank distension and pain, nausea and vomiting, stroke silent, limb pain and numbness, beriberi, swelling and poison, beating and swelling and pain and so on.