Bacon is usually made from pork belly, but are the two products interchangeable? Just try swapping these ingredients when making pork belly bao buns and you'll see how different they are.
Most British recipes for Boston baked beans just use a piece of pork belly, but we think it needs some salted or smoked meat to counteract the sweetness, so we include bacon or pancetta.
Bacon has been well-loved dating back to 1500 BCE, when the salted pork belly first appeared in China since then it typically is the meat portion of breakfast or added to dishes for its flavor.