As for medicinal materials, it is best to add American ginseng (ginseng can also be used), angelica, astragalus, licorice, medlar, ginger and jujube.
The reason why American ginseng is used is because black-bone chicken itself is hot, and with a variety of tonics, the nourishing effect is too heavy. American ginseng is cultivated but not greasy, benefiting qi and generating blood.