1. Apply salt on the duck pieces, rest for a while, and then rinse in the water, pat dry with kitchen paper. Chop the brown slab sugar into small pieces.
2. Heat a wok with oil, sauté the scallion pieces and ginger slices until fragrant, and then add fermented red bean curd, brown slab sugar, shaoxing rice wine, ground white pepper and stir well. Turn off the heat, add the duck pieces, coat the duck with marinade and marinate in the refrigerator for one to two hours.
3. Heat a wok with oil on high heat, sauté the ginger slices until fragrant, turn to medium heat, add the duck pieces, pan fry until both side golden brown and cooked, add scallion pieces and stir well, transfer to the plate.