Mix all ingredients except pork until sugar and ascorbic acid are totally dissolved. Put in a big bowl.
Soak whole pork in this solution and prick all over with a fork or ice pick.
You may also use a syringe to inject solution into the thick meat.
Cover bowl with a clean cheese cloth or foil. Store in refrigerator.
For 3 days, turn and prick once a day.
On the 4th day up to the 18th day, turn once a day (no pricking needed).
On the 19th day, wash 3 times in clear water. Then tie a string around the meat to prevent the meat from sagging and boil in the following mixture: