My family always washes the pig skin and boils it. When boiling, I add a little salt and sometimes a little soy sauce. The skin turns red when frozen. After boiling, just put it in a cool place and wait for it to condense. I think whether the skin jelly tastes good or not depends not only on the production process, but also on the taste of the pig skin itself. Some pig skins are fishy, ??while others are fragrant.