How do fish shave their spines to make fish balls?

A: I have lived in Weihai for more than five years, and the local people's living habit is to eat seafood. Around May Day, there were many boats in Xiaohai, and the fish were fresh. Sometimes local people like to buy the snakehead or small yellow croaker to make fish balls, because I live in Bugu Town, Huancui District, and used to be a bungalow. I often go to the elder sister's house next door, and one day she bought it back. Remove the fins, tails and spines in the middle, and then gently chop the fish with the back of a knife. After a while, she scraped off the top of the fish with the other side of the knife, and then chopped it with the back of the knife. This was repeated several times, leaving only fishbones on the chopping board. Then he put a little chopped green onion, pepper noodles, salt, some powder on his face to make fish balls, some water in the pot, and some coriander on the pot.