1pound of fresh pigskin,hair scraped off
1scallion, cut into 6 to 7 pieces
1-ounce piece ginger, peeled,cut into 3 to 4 pieces
4 cloves of garlic
1/2 ounce Sichuan peppercorn (Asian prickly ash), whole
1 whole star anise, broken into 4 or 5 pieces
2 table spoons Chinese cooking wine
Salt
Soy sauce
1 table spoon vinegar