1. Wash cordyceps flowers and red dates for later use.
2. Wash the duck and cut it into pieces. Add ginger slices to a pot under cold water to get bleeding.
3. The longan meat is macerated, and the yam is peeled and cut into pieces.
4. Put all the ingredients in the pot, add a piece of ginger, pour in clear water, boil on high heat and change to simmer for about two hours, add salt to taste.
