1. Prepare fresh blueberries, a basin of water, add an appropriate amount of salt, put the blueberries in and soak for about five minutes, then drain the water, and then rinse gently with tap water.

2. When cleaning blueberries, be careful not to damage the white powder on the surface of the blueberries, so just rinse them gently with water.

3. Take a clean pot, add a small amount of ice water, then add an appropriate amount of rock sugar and bring to a boil. When the rock sugar melts, turn off the heat and let it cool.

4. Take another pot, put the washed blueberries in, add an appropriate amount of water, the water should cover the blueberries, heat over low heat, wait until the blueberries become soft, turn off the heat and let cool for later use. .

5 Stir the prepared rock sugar water and blueberry juice evenly, then add an appropriate amount of lemon juice and mix evenly before drinking. If it is hot summer, you can put it in the refrigerator for a while before drinking.