What is the relationship between amber and jade in the third season of "Ferry of Soul"?

Emerald is the descendant of Jiutian Xuan Nv and the reincarnation of Amber. She has the same face as Amber. She is a mysterious yelang, and Wang is a fairy with nine whirls. Amber, Wang's good sister, was once a fairy in the sky. Then the Yelang clan came into being. They began to study pharmacology from Wei and Jin Dynasties, and they are pharmacists passed down. The medicine corpse in the play is the first batch of medicines domesticated by the ancestors of Emerald thousands of years ago, which Yelang clan called Fa. Jade is a yelang, a pharmacist who controls drugs in all living things. She has an innate talent in her blood. So, she saved Mr. Shu.