More formal version: bring the water to a boil, turn off the heat, pour in sago and stir constantly, pour in rock sugar and coconut juice after two or three minutes, and cook until sago is translucent (with a little white heart) and leave the fire. After the cooked sago is cooled, put it in the refrigerator and drink it immediately. You can also add diced fruit and condensed milk when eating and mix well.