1. Cut pieces of pig fan bones.
2. Boil the bleeding water in boiling water.
3. After blanching, rinse the foam with clean water.
4. Put the lotus root, black eyebrow beans, blanched pork bones, ginger slices, and red dates into the water, because I use a gas stove. After the water is boiled, reduce the heat to a low heat for 2 hours, and then add some salt to taste.
