Cut the pork into small pieces, about twice the thickness of your little finger
Add both soy sauces and the 5 spice powder to the pork, mix well then cover and keep in the fridge for 4h- overnight
Remove the pork from the fridge and let it come to room temperature. In the meantime, mince up your garlic.
Heat your pot over low-medium heat, then add some oil. When the oil is shimmering, add the garlic and stir fry till fragrant.
Increase the heat to medium then add the pork and brown the pieces.
Add enough water to cover the pork then cover and simmer for 40 minutes. If including hard boiled eggs/ tofu/ peanuts (cooked), add them in during the last 10-15 minutes of cooking. At the same time, taste and salt the stew accordingly. (You can actually add them in earlier if you want their flavour to be more concentrated, however this will give you overcooked eggs with the tell-tale green rim around the powdery yolks)