Separate the skin on the pork shoulder crosswise without cutting the meat.
Heat the soy sauce, sugar, salt, paprika and cinnamon, sugar and salt to dissolve.
Rub the skin with this mixture, and then the meat on all sides. Preheat oven to 230 ° C. Place the meat on the grill, installed in the tray. Bake 20 min. Lower oven temperature to 160 ° C and bake for a minimum of 4 hours can be 6 hours. The meat should be so soft that it can be eaten with a spoon. Serve it with rice, noodles or sandwiches.