1. Prepare the ingredients.
2. Put the bones in boiling water and scald them, remove them for later use.
3. Cut the taro into hob pieces, knot the green onion, and slice the ginger.
4. Put boiling water in the pot and put the bones.
5. Add ginger, spring onion, and ginseng, cover and simmer slowly.
6. When the bones are rotten, add taro to cook.
7. Finally, add salt and chicken bouillon.
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