I finally finished it after having it on hold for quite a few months and here is what i have to say:

Story and characters: This has a lot of loopholes. The biggest and most disappointing one being Su Youlian being the saintess didn't even know much about her own clan. Like wth? You just have brute strength and no brains right? And your brain works only when making use of prince mu and manipulating li xuan? Plus both the guys sacrificed a lot for her while she gave nothing in return. Why are all the cdrama girls always like this? Next, how come the 2nd princess knew so much? She was such a complex character, god! On to another one. Li Xuan thinking that the FL was responsible for his father's death, hurt her so much, but after he regained his memories and realized everything, how come he couldn't bring himself to hurt that person? Like c'mon man, you hurt the girl for no real good reason but let go of the real criminal. There were several such loopholes everywhere and not to mention the reactions of everyone in real situations was off, again one flaw of how the story was written that simply excluded the fact that others should be surprised at certain things. The story was great in itself, except how it was executed with so much flaws. This one could've been a really great one if the plot was done justice.
Also the pacing. The initial episodes were pretty slow for a show that's gonna have just 28 in total. So a lot of time was wasted in useless stuff and that made the later ones too rushed. At times the love triangle part gave me Ashes of Love vibes for real ngl!
Ending: the later episodes were obviously rushed and needed better explanation, but it wrapped up with everyone having a happy ending.

Acting: I love Xu Kai.. he is just so charming and amazing. His character was pretty poorly written just like most others, but his acing was great. The FL could've smiled a little more. The 2nd ML was my favourite again. He did a good job, basically his character was good beyond imagination. Other actors did a pretty good job too. Now onto Lord Zi and the sword spirit, these 2 shifus were horrible. And this lord zi guy is everywhere! And he is the same evil every time ugh.

Music and others: The cgi and effects weren't bad, but nothing extraordinary either. The costumes used for the sha guo arc were very beautiful but not so much for anyone else. The music was pretty good, i liked it. Btw, i don't understand the name of the drama. Like why and how is it even related?

Anyway, overall i liked it, but wouldn't probably rewatch it. Since it's just 28 eps with the basic story being pretty good, I'd suggest giving it a try.