1. Soak in cold water for about 20 minutes to remove impurities floating on the pork belly. \x0d\2。 Turn the pork belly upside down and cut off the fat with scissors. Then take a proper amount of alkaline noodles and rub them repeatedly. The alkaline surface must be evenly coated! Knead for about three minutes, then rinse with water. (The alkaline surface can be replaced by alum) \x0d\3. Apply pork belly with coarse salt and flour again and rub it repeatedly. Flour can take away the stolen goods from pork belly, but coarse salt particles have this effect. After about two or three minutes, rinse with water. \x0d\4。 Finally, rub the pork belly with white vinegar or rice vinegar for about three minutes, and a clean and tasteless pork belly will appear. \x0d\5。 At this time, boil the water in the pot, put the pork belly in and cook for about three minutes, and then scrape off the residual white fatty oil on the pork belly again with a knife or scissors.