Rinse duck under clean water and rub lightly until clean. Discard duck's feet and wings. Pat dry.
Heat wok WITHOUT any oil,the heat salt, spices on pan until fragrant comes out. Let cool.
Rub salt and spices all over the inside and outside of the duck, and stuff a dry cloth into the body. Using another towel, wrap the whole duck and tie tightly and let marinade for 1 whole day.
Remove towel and cloth, then use a piece of kitchen paper to wipe away the excess salt and spice on the body. Rub wine all over duck's body evenly, then steam over hot water for about 1 hour and fourty minutes until done. Take out,let cool and cut into pieces. Serve warm or cold.
Although this dish can be served either warm or cold, it is most commonly eaten as a cold dish.
When buying fresh ducks, choose those with shiny and thick feathers. Meat should be thick especially at the chest.