
maidenholmes:
7. Truth or Dare - Chinese historical - FL is street acrobat who accidentally marries a prince when her wedding carriage is mistaken for an identical one with a princess. There are a number of versions of this, usually under title Wrong Carriage, Right Groom.
If I remember correctly, he isn't a prince but a general/son of a general. I suppose he could live in the palace or be some extended royal family, but I don't recall that detail. I was under the impression they lived in the city. She swaps with the princess, who ends up staying with the other groom, outside the palace after they inevitably fall in love. I don't recall her having to go back to palace life, at least not long-term by the end of the show, I guess it depends how literal OP wants to be about Royal Family and living in the palace. I have only seen the Truth or Dare version, so the other ones could have a prince instead?