FreshPork skin500 grams, wash the pork skin, place it in a pressure cooker, add fresh broth, and addginger, large onion,sodium chloride,pepper powder, cooking wine,MSG, cover and cook over high heat until the pork skin turns into juice. After cooling, remove the residue when opening the pressure cooker, pour the broth into a square dish, let it cool, then refrigerate to formgelatin, for more answers>>