Quack is the sound made by eating something hard and crisp, and later it is also described as delicious or neat. It is also the name of a brand.

Source:

Xinmin Evening News1984 September 12 Among all kinds of snacks, it is particularly worth mentioning that one seems to be called "Jiaxing Radish". The raw material is just a very common radish, but it is finely made and the seasoning is exquisite. It is crisp and sweet when bitten in the mouth.

Crispy food:

"Gabang Crisp" is a specialty of Yangquan flavor in Shanxi, which is fashionable with cartoon names and sounds. It is famous for appeasing Xi Hui village. In fact, it is a very thin tortilla with white flour in it.

When the dough is rolled out, cook it in a pancake pan. To make corn flour, we must first scald the noodles, and it is most important to master the water temperature and quantity. Mastering the heat and turning the cake surface are all learned and skilled. Nowadays, "Gabang Crisp" has gone out of Niangziguan and traveled all over the country, becoming a resounding and delicious brand in Yangquan.