Step 1: Wash dried lotus leaves, dried hawthorn, coix seed and dried tangerine peel; Soak the dried tangerine peel until soft, and scrape off the white pulp;

Step 2: put the above materials into a pot, inject 4 bowls of water, bring to a boil with high fire, and turn to low heat for 30 minutes;

Step 3: add rock sugar, and turn off the heat after the rock sugar melts.