The Ending Order of the Qin Dynasty

In order to find clues to the disappearance of her biological father, the daughter of a glass craftsman took the risk to pretend to be the prime minister's daughter, and married King Ningbei, who was possessed by a time traveler. She gradually unraveled layers of conspiracies. Is her father's disappearance actually related to the fall of the dynasty? King Qin's elixir of longevity, the purpose of the time-travelers, the truth behind his father's disappearance, the ambition of the grassland people to conquer the world, the lover who is destined to be unable to love each other...