Thaw the pork to room temperature.Add cooking oil in a frying pan and brown the meat on the surface.

Boil a pot of water enough to cover the pork. When the water comes to a boil add ① to the pot and turn off the heat. Cover the pot and leave it for 15 minutes, using the residual heat of the water to continue heating.

Put ② back on the heat and when it comes to a boil again, turn off the heat and leave it for 15 minutes with the residual heat.

Make the marinade. Bring A to a boil in a small saucepan. When sugar dissolves, turn off the heat.

Marinate the ③ pork in the ④ sauce and let it keep for 4 hours.

Take out the meat and slice it into small pieces. Simmer the sauce until it thickens.

Arrange the meat on a plate, garnish with boiled bok choy and leek mixed with white sesame seeds, and pour the sauce over the meat.