Female lead is perfect almost like Mary sue but
As a princess, Her difficulties lies in planning revenge against emperor , so she cannot be not perfect when facing them . She is kind, calm , smart and plan many steps ahead , so without martial art she still badass. She is the best physician but got framed in lots of life and death situation from minor to the biggest.
So, Male lead who is martial art and equally smart as her should be the one who will protect her when she is in tough situation.

FL is perfect that she is also loved by other three men which means it is unique in this drama .All men are likeable ,each with their own style. Here, FL has married thrice before ML that we can imagine as three life time in Xian Xia , just kidding.

Chemistry between leads is amazing ,
everytime ML suspect her as chu jiu Ling ,not only sparks flying between the two, it looked like it is rolling inside of them too
Jiu Ling keeping emotion in and ling jiu letting emotion out. Haven't seen such an intensely emotional scene based on convincing conflict in a long while.

There is no misunderstanding between leads not even a bit, only joking about how they jealous each other unlike other drama which they put mainly a little.

It was really worth watching!
Highly recommended !!!