Prepare the Duck:
Remove any giblets from the cavity of the duck. Rinse the duck thoroughly inside and out and pat dry with paper towels.
Using a sharp knife, prick the skin all over, being careful not to pierce the meat. This helps render the fat for crispy skin.
Season the Duck:
Mix the five-spice powder with a pinch of salt and rub it all over the duck, including inside the cavity.
Truss the duck with kitchen twine, tucking the wings and legs securely for even cooking.
Dry the Skin:
In a small saucepan, combine the honey, soy sauce, sesame oil, and rice vinegar. Heat gently until combined.
Brush the mixture generously over the duck, coating all sides.
Place the duck on a rack in a roasting pan and leave it uncovered in the refrigerator for 8–12 hours or overnight to allow the skin to dry.
Roast the Duck:
Preheat the oven to 350°F (175°C).
Roast the duck breast-side up for about 90 minutes, basting with the honey-soy mixture every 30 minutes.
Increase the oven temperature to 425°F (220°C) for the last 15–20 minutes to crisp the skin further.
Rest and Carve:
Let the duck rest for 15 minutes before carving. This helps retain the juices and ensures tender meat.
Serve:
Slice the duck thinly and serve with Mandarin pancakes, hoisin sauce, green onions, and cucumbers.