Why Eight Treasure Duck but not Eight Treasure Chicken?

The most challenging part of Eight Treasure Duck was getting the bones out without breaking the skin.
Why use ducks? It's because ducks have bigger chest cavities than chickens, and their skin is thinner too.
Each chef's Eight Treasure ingredients are different. This time, the Eight Treasure ingredients are carrot, turnip, duck gizzard, dried oyster, shiitake mushroom, mushroom, ginkgo seed and sea cucumber. The ingredients alone are already a kilo, which is plenty.
The ingredients need to be boiled and then stir-fried. The fried ingredients are then added to the duck and coated with dark soy sauce for colour. The duck is then deep-fried to tighten the skin. It could make the duck crispier, and at last, the duck is stewed. It is savoury and fresh, and the ingredients are crispy!