It’s very confusing in the previous chapters but it does appear as @seraphina said, she was born the 6th but considered 1st daughter because her mother was the first wife.
But srsly mc should cancel the marriage herself only troublesome not doing this. She doesnt want to make her enemys happy by canceling? so what let those 2have their engagement and ....later play tricks with them...
im confused, shes in her disguise when shes in the auction house as a boy right? even then in the previous ep it keeps on switching with her in disguise and her as a girl..
i think the translator is having a hard time to translate this story cause his/her translation getting mix up to the point that sometimes it's so vague to interpret or understand the flow of the story.
Just cuz Gu Xijue did not look like Gu Xijue the sister is suspicious that she is By Xijue... why can't she be another person huh? Not to mention she was supposed to be a man... It's getting ****tier
She is the 1st daughter of being husband and wife a legitimate child.
Nahh i get it now... after reading all of the chinese novels.... her sisters are the mistress child that's why she is the eldest even tho she's the 6th child to be born