High level cinematography, interesting and fast moving plot from the very beginning, which put you in the center of the story (excellent idea).
Very good mass scenes, gorgeous costumes and decoration.
Intensive and well composed fighting scenes.
Acting of the main 3 leads was fascinating. All 3 lead actors delivered their characters completely and authentically. Especially pleasant was the FL character and Victoria Song acting (unusual female mature acting for Chinese dramas, without overacting).
Very good supporting actors and supporting characters revelation.