Reincarnated into an ancient time in the body of a young girl who must fight to get back what is rightfully hers. From the beginning she accidentally injures and then heals a handsome young stranger who she gives the name Xiao Ling Huo. She takes him as her husband-to-be and they are quite fond of each other. Unbeknownst to her, he is actually the incredibly powerful State Master, respected and feared even by the emperor, who had reverted to a younger/smaller version of himself while healing. He appears to be mixed blood, human with some unknown, powerful black-winged being. He loves her but she dislikes his adult form because he is clearly fond of her and she does not know he is actually the same as her beloved Huo.
Novel:
https://www.novelupdates.com/series/unprecedented-pill-refiner-entitled-ninth-young-lady/
But, only ~100 out of ~1200 have been translated and it looks like the translation project has been dropped.
Peerless Alchemist