Watermelon chopped out and put in the refrigerator, leaving the skin
Remove the dark green outer skin and cut into pieces
Clear water, put less or you will cook for a long time, 70g almost
Skin and water mixing
Add 20g rock sugar and 20g sugar
Slowly cook over low heat for about 10 minutes, stir while boiling, and smash the red slag around.
Cooled into the refrigerator
Watermelon juice poured into the refrigerator