Soak peach gum with more water overnight (at least 12 hours) till it expands and soft. Rinse the jelly like peach gum a few times with a sieve. Remove the impurities and rinse again, drain well.
Soak the snow fungus in water till it becomes soft, about 20 minutes. Snip off and discard the yellow hard part on the under side of the snow fungus. Cut up the snow fungus into small pieces.
Bring water, peach gum, pandan leaves and snow fungus to boil and simmer at medium heat for 30 minutes.
Remove papaya skin and cut into small chunks. Drop in the papaya and simmer at low heat for another 10 minutes. Then stir in rock sugar till dissolved.
Serve warm or chilled.
Notes
Not suitable for pregnant women, menstrual period women, children under the age of two.