We’ll start with the pork because it needs a little cooking before being added to the broth and its vegetables.
So, add the oil to a large skillet and set it on a medium-high heat. I used a deep, heavy, 12-inch skillet that was big enough to hold all the cubed pork in a single layer. Let the oil heat for about 90 seconds and then stir in the pork.
You’re aiming to give the pork a sizzling, fairly leisurely stir-fry for 3 minutes on that medium-high heat, so that the cubes just begin to pick up a little golden color and their fat starts to melt. As soon as that happens, stir in the cayenne peppers, ginger, five spice powder, and sugar.
Continue stir frying for another 2 minutes, drop the heat to low, and add the bay leaves, light soy sauce, Shaoxing rice wine (or dry sherry) and the rice vinegar (or apple cider vinegar.) Give it all a good stir and drop the heat to low. You now want the mix to come up to a slowly bubbling simmer on that low heat. When it does, turn off the heat and let the skillet sit while you sort out the broth and its vegetables.