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If you`ve ever been to a chinese or viet party, you`ll almost always see thit heo wai, aka roast pork that has chinese 5 spice and super crispy skin. I had some the other day at my cousin`s party, it was so good. One of the reasons why I will never be a vegetarian lol.
P.s. I think the pig`s head is mostly for decoration, although some people may eat it.
photo is my own