Slaughter the duck first, cut it into pieces with a width of 3 cm and a length of 5 cm, remove the pollution, slice the ginger for later use, then put the pot on the fire, fry the pig oil for 5 minutes until it is golden yellow, add cooking wine when the aroma is fragrant, put 35,000 grams of water in a casserole and stew it for 3 hours with low fire, and add monosodium glutamate.