If you watched “Legend of Haolan” that’s the story of yin zheng’s mother. In the legend of haolan it said that the father is the hostage prince of Qin, but here his father is Li Bu Wei. In the Legend of Haolan, there’s a rumor that her mother has relationship with Lao Ai and it proves here. Li Bu Wei and Haolan are from Zhao state, Li Bu Wei wants Haolan to be the queen of Qin and it really happened. I think this is the story of their son. It means Ying Zheng is really not the late King’s son. In the legend of haolan, Yin Zheng has a lover named Li Ge, i think it is Gongsun Li in this drama.