be rich in vitamin C (contain 400-500mg per 100g )and glycoside,fructose,glucose ,protein ,lipide etc.clearing away heat and cooling blood ,body fluid regeneration stop coughing ,slip bowels and expelling of toxin ,young skin and beauty face ,moistening the lung and eliminating phlegm ,be used to longevity ,agerasia ,Swelling of throat Sore Pain ,constipation ,irritability-restlessness etc.