Because the scales of Chinese sturgeon are harder than other scales, you should soak them in warm water at 70 degrees for about 20 seconds first, instead of boiling water. Then rub it hard with a wire ball, rub the shell and don't rub the fish, or it will scratch the meat? . Or just use a knife to pry open the carapace. It is very dangerous to clean the scales of Chinese sturgeon, so be careful not to hurt your hands.