I love this drama. Overall it is simple and not draggy like others C drama. However I realised something was amiss in the plot, felt like they tried to shorten the drama and became plot mistakes / plot holes
Those who have not finish watching, there will spoiler. You may stop reading here.

Here is the lists of plot holes I found :

1) they didn't exactly explain why Chang Le is able to play Zither. How Yu Yao's "mother" knows Chang Le how to play?
2) What happened to the fragrant pouch that sewed by Chang Le? The drama of emphasis on how Chang Le put a great effort in completing it and but never showed she give it to Li Che.
3) in certain scenes, it somehow shows that someone was spying over them using magical well /water but never reveal this part of the story
4) it seems like Miss Dong, the tailor, has a close relationship with the Emperor and Empress Shen but never elaborate or explain in details. The emperor seemed to have a particular feelings toward Miss Dong.
5) the drama also doesn't explain why Chang Le's master Duan Nian'er pretended to be dead and lied to Chang Le.

There is also some smaller details that I felt like incomplete which I didn't include the list above but I felt those not as crucial.