1. Soak the ebony plum, hawthorn, tangerine peel and licorice slices in water for 20 minutes, take them out and set aside.

2. Put the ingredients into the pot, pour in water, bring to a boil over high heat, turn to low heat and simmer for 20 minutes, add an appropriate amount of rock sugar, and turn off the heat after the rock sugar melts.

3. Store it in a glass bottle after cooling naturally. It will taste better after being refrigerated.