I can't help but think tbh the person who is the emperor cannot stay alone for the rest of his life right? I mean the emperor needs an heir to the throne, it's compulsory for them to get married and have children. Even if he wants to be loyal to Lady Qin.. unless he has an heir from his bloodline such as a nephew.
Might be a weird question, but how much is CCP propaganda here? In these types of dramas always have it, I kind of dropped some for this reason before.