Put all the ingredients in the pot and cook over low heat, stir while cooking until the agar is completely melted.
Pour the boiled juice into the cup, cool it to room temperature, then move it to the refrigerator for 1 hour, and take it out to the plate.
The amount of agar can be adjusted according to your own taste. If you like to eat soft jelly, put 3g. If you like to eat Q, put 5g. The amount of white sugar is also adjusted according to your taste.