We call this kind of "white powder", and some people next door call it "rice powder" or "rice flower".
This kind is made of glutinous rice harvested in that year. First, the glutinous rice is steamed, then it is made with a model to dry and dry, then it is boiled on both sides, and then dried. Finally, fry it with peanut oil, air it and eat it. Crispy mouth is delicious.