Rinse dried tangerine peel; Soak it in water for 3 hours; Remove it; Gently scrape off any white pith.
Rinse and drain ginger; Slice an half of the ginger; Peel and slice the remaining.
Soak dried lotus leaf in water for 30 minutes; Remove and drain it.
Rinse pitted dried red dates under running water; Put them in a bowl; Fill the bowl with water; Add 1 tsp salt into the water; Leave it for 15 minutes; Remove them; Rinse them under running water again; Drain them.
Rinse winter melon under running water; Scrape out the seeds; Cut it into chunks.
Rinse a duck under running water; Discard any innards and any lumps of fat from the duck’s cavity; Remove any feather with a pair of tweezers; Rinse it under running water again; Drain it; Cut it into pieces.