Cha Siu that Isn't

Cha Siu means forked roast, once upon a time, they were roasted on a skewer.  You could still see cha siu that has a skewer hole.

Then obviously, the so call cha siu from Japan is not very much not skewed or roasted, it is a porchetta, roasted.

Then cha siu buns and cha siu baps were once believed to use leftover cha siu, I only to learn they were just cooked sweetened/seasoned pork!  Never had they been skewed or roasted.