Alcohol in small packages can evaporate slowing and form a protecting layer around the food. It can suppress mold formation and extend shelf-line of the food dramatically.
Fillings are made from special non-toxic isomers to make sure of food quality.
Besides aerobic bacteria, also effective to anaerobic bacteria and yeast
Prevent hardness of food surface to keep softness
Prevent smell by alcoholic odor
Prevent shrink by plumping package
short-term preservation of mooncakes, cakes, bakery, etc.