1. Duck feet, winter melon, mung beans, etc. are cleaned and set aside.
2. Boil the duck feet in hot water and remove them for later use
3. Put water in the pot. After the water boils, start to put the ingredients except the winter melon, and then simmer for two hours.
4. Put the winter melon down after the soup has boiled for an hour, so as not to put it down too early and it will rot.
5. The soup has been simmered over a low fire for two hours, then you can drink it with a little salt.
