Cut the pork butt into 2 cm thin large pieces and marinate the pork with all of the seasonings. Set aside overnight.
Drain to remove the extra sauce on the surface. Mix all of the sprinkling spice together in a small bowl.
Heat oil in a cast iron or a regular pan until really hot, and then fry the pork butt over high fire for 1 minute on both sides until well caramelized. And then slow down the fire and fry the pork slices for another 3-4 minutes until you can insert a chop stick in easily. Turn over twice during the process. Sprinkle half of the spices evenly on both sides..
Cut the pork butt into small cubes and mix with spices. I recommend add some mint leaves, which can add a small faint flavor and work as a decoration.