Scorned Wife, Crowned Princess

Xiao Qingxue, Princess of Nanzhao, hides her identity to cure Pei Ziyan, Prince of the Yong dynasty, and help him seize the throne. Once empowered, Pei Ziyan demotes her to a concubine to marry the general's daughter. Xiao Qingxue divorces him, takes back everything, and returns to claim her throne.