Add salt, sugar, soy sauce, soy sauce, oyster sauce, pepper, cooking wine and water into the bowl and stir well. Add ginger slices, onion slices and cooking wine to pork belly and cook until it is 80% cooked. Take it away. Punch a hole in the skin with a toothpick, and then wipe it evenly with soy sauce. Heat oil in the pan, cover the skin downwards and fry for four minutes. After frying, wash off the grease on the surface, cut into thick slices, and put the pepper in, with the skin facing down.