The Wrong Royal Bride (2020)

both drama involve FL as fake princess , replacement bride for ML who is crown-prince/king, one have throne without power other have power and desire for throne .

In both dramas :
- Female lead is a talented doctress , with strong personality but also feminine and cute.
- Male lead appears to be cold at first but he's just lonely
- Male lead has a position with political power and needs to handle militarily affairs
- Arranged marriage were the female lead is forced to get married
-Male lead has a misterious (supernatural) incurable disease which the female lead tries to cure
- Love /hate relationship turns quickly into passionate romance
-Merxat plays in "For married doctress" as the male lead and in " Legend of yun xi" as the second male lead

Overall those dramas are literally THE SAME lol
For married doctress is a little lighter though.

fake princess identity
Fl is also a doctor
the end is a little bit similar
ML personality is similar

Both are a low-budget romantic dramas where the action takes places mostly in the royal harem. Both have nice chemistry between the leads, a little bit of political scheming, some same plot twists and some typical Chinese melodrama clichees