In a mixing bowl, combine pork slices with 4 tablespoons of soy sauce. Coat the pork with soy sauce and then marinate for 1 hour.
Heat a wide cooking pot and then pour-in the cooking oil.
When the oil becomes hot, put-in the garlic. Add the whole pepper corn and dried bay leaves. Continue cooking until the color of the garlic becomes light to golden brown.
Add the pork along with the remaining marinade and sherry. Cook for about 5 minutes.
Pour-in remaining soy sauce, oyster sauce, and water. Let boil and then simmer for about 40 minutes.
Put-in the vinegar. Allow to re-boil.
Add the sugar and then stir.
Put-in the boiled eggs and cook for 2 to 3 minutes.
Transfer to a serving plate.
Serve with warm rice. Share and enjoy!