Cut the bottom of the napa cabbage, detaching the leaves from it
Soak the cabbage leaves in water for 15-20 minutes
Rinse the cabbage leaves to make sure there is no dirt on them
Choose a larger leaf and lay it flat on a cutting board (or counter top)
Put 3-4 slices of pork belly on the cabbage leaf. Sprinkle some salt (and white pepper powder) on the pork belly slices
Repeat the aforementioned step until pork belly slices run out. Put a large leaf on top
Press the stack of leaves/pork belly slices a little bit. Cut the stack into three shorter stacks
Put the stacks in a cast iron pot or stanless steel pot in the upright direction. Add a few tablespoons of water or rice wine
Put the pot on a stove without lid
Turn the heat to high and bring the liquid at bottom to boil
Immediately turn the heat to low, put on lid and simmer for 60 mins