Overall: I'm a sucker for historical drama, especially when it involves time traveling! This drama totally got me hooked to the point that I didn't wanted to sleep because I needed to know what would happen next. 9/10 Plot: The story overall is very well written. It keeps me on top of my game as there are so many plot twists. However, there are certain parts where I don't really feel the flow of the story. It could have been due to the lack of transitions that make some parts feel like things happen so suddenly and disconnected. Also, I didn't really like the fact that Ruo Xi's actions don't seem to affect the major outcomes of history, which makes the story slightly more predictable as we already know in the beginning which prince will become king. There are other historical dramas with a better plot for time traveling. But nevertheless, the political conflict for the thrones between the princes always put me in suspense. I like the humor every once in a while to help lighten up the mood so the plot doesn't feel so painful to watch. It's not that the plot is bad, but all the drama in this can makes things seem heavy to experience. 8/10 Acting: The acting is superb I might say. The casts have performed their roles perfectly. I love the little details such all the actors/actresses did to give their characters a distinct personalities. I often found myself crying because I was so submerged into their acting. I'm going to be a little bias, but I really like Wu Nicky's acting. His portrayal of the calm and collective 4th prince has me rooting for him the entire way. 10/10 Music: I actually started watching this drama because my friend showed me the opening song of this drama. But overall, the drama's music is the biggest factor in making me having these emotional roller coasters. Without it, some scenes won't be as intense as they should be. The main theme song is absolutely fantastic. It is simple but it definitely captures the entire meaning of the story. 10/10 Rewatch value: I feel some scenes are a bit redundant but I guess they all help creating the intended atmosphere. There are a lot of greenscreen popping up in this drama either due to low budget or other reasons. But I won't say that the greenscreen is that horrible if you don't look closely. If you can get pass that then everything else should be fine. I wouldn't mind rewatching the drama, but the political intensity makes the entire drama seems quite long. 8/10