1. The yam is peeled off.
2. The yam is cleaned and cut into large pieces.
3. Put the yam in the boiling pot and scoop two bowls of big bone soup.
4. Bring to a boil for two minutes and season with salt, then add sweet beans.
5. Boil it again, and the pot of soup will be ready.
6. Serve and enjoy.
Just boil the sweet beans. Don't cook for too long, so cook the yam first and put the sweet beans later.