i did. and i think they said pig's stomach, but pretty sure that's not right...there was a language barrier. got it from hong kong supermarket in edison nj it was labelled as uterus, but a google search quickly disagreed w that, also the "butcher" said stomach, which google also disagree with...so i'm kinda confused. aso it said that it was "prepared"/meaning cooked already...but then another person who works there said its not cooked yet.... ...alas, i decided to to ask the ppl on the internet if they had any clue...seems everyone here is also kinda unsure. o well