Radish.

The tube bone is usually the hind leg bone of the pig, the bone is usually thicker and is a large bone that holds the marrow. Tubular bone soup is very tasty and easy to prepare. The bones are rich in calcium, but the solubility of the calcium in the bones is very low, and it is difficult to stew the calcium in the bones by fire. You can add a small amount of vinegar to the stew, which can increase the solubility of calcium.

Expanded:

Note:

The barrel bones must be soaked and blanched, which removes both the blood froth and some of the fat.

Don't boil for too long after adding goji berries, or the flavor will be affected.

If there is too much floating oil after the soup is boiled, you can use kitchen absorbent paper to absorb some of the floating oil.

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Baidu Encyclopedia - Tubular Bone Soup