Idea of love story includes father-in-law and his daughter-in-law sounds intriguing. Action takes place in Tang dynasty and it's based on true events in history. However story is loosely made on facts and it is mostly fiction.

Creation of Yang Gui Fei is little riduculous for me. She is young and stupid girl, who doesn't know how to behave. Her actions look randomly and often don't make any sense. It looks like she has only one purpose - looks beutiful on screen.
Other characters don't have any depth. We can't understand their decisions, because we don't know what their thinking. Their psychological portrait shouls be elaborate, which would make their motives more clear.
Concept of Byzantine envoy narration is fascinating, but I'm not sure if it suits this story.
Ending is messy and little strange. I understand that authors wanted show us characters great love, but I don't think it was good way to do it.

The best aspects of this film are for sure visuals. They look brilliant and far-fetched. Every footage is piece of art. They are breathtaking and make this film worth watching. Costumes and hairstyle are also mesmerizing.

Music is also very good. I think it suits scene well. It makes them more intense.

Overall "Lady of the Dynasty" is so so movie. Idea is fascinating, but unconvincingly made. Script doesn't give justice to story. On a good note visuals are compellig and look expensive. Moreover Fan Bing Bing is definitively beautiful and pleasing to the eyes.

Authors could offer audience much more. Historically Yang Gui Fei is shown as vicious and powerful woman not as lost girl. I would love to see interpretation like this in future.
However I have to give props to scriptwriter for knowledge that lychee was Yang Gui Fei favourite fruit.