Is the fragrant medicine in Search for Ji Shen a fairy?

Search Ji Shen's fragrant medicine is immortal! Because in the finale, Xiang Yao or Dai Xiao said, "Look, she has been waiting for 500 years!" "And the fragrant medicine is the daughter of Fuxi, the king of man. Before he died, Fuxi said that the fragrant medicine had been made a princess by heaven. So, I think the fragrant medicine in Search of Ji Shen is immortal.