If children drink it, add some pearl shells, but they are a little expensive, but not too bitter. If adults are not afraid of hardships, ordinary Fritillaria will be fine. The materials are: pearl oyster 3 yuan, Sydney 1, North and South apricot 1, orange cake 1, and appropriate amount of rock sugar. Practice: break the pearl shell, wash the Sydney, and. Slice orange cake; Put all the ingredients in a pot, boil with 5 bowls of water for 45 minutes to make 2 bowls, and take them twice. Function: It has the effects of clearing away heat and resolving phlegm, relieving sore throat and relieving cough. Helps prevent and treat sore throat and cough.