1. Let the master who sells bones help to deal with it first. Chop the big bone into small pieces, then wash it with clear water, blanch it in boiling water for a while, and remove the blood from the bone.

2. Take out the big bones that have been blanched, put them in cold water to remove the floating foam on the bones, and then drain them for later use.

3. Main ingredients: lotus root and red dates, and auxiliary materials: ginger and medlar. Wash the lotus root, peel it, and then cut it into small pieces. Wash the red dates and medlar with clear water once. Wash the ginger, peel it and shred it. Then put the ingredients, auxiliary materials and blanched bones into the pressure cooker, add salt and cooking wine, stew for about an hour, and try the taste.