Wafers are not biscuits, they are a way of making them. Wafer biscuits are made by puffing. Wafer food is a type of puffed food.

Puffed food is made of cereals, potatoes or beans as the main raw materials. The volume increases significantly before and after being cooked by baking, frying, microwave or extrusion. Phenomenal food. It can be divided into four types: baked type, oil type, direct extrusion type and colorful type, such as snow rice cakes, potato chips, shrimp crackers, shrimp crackers, popcorn, rice crackers, etc.