Maybe her brother isn't dead - and she is a "hostage". They couldn't find him so they get her so he can't do anything against them - something like that?
Zi Ying and Ling Sha - the way he looks at her - looks like love triangle once again - Is history repeating itself? But on the other hand there's something in the way Zi Ying looks at others so mayby it's not like that?Idk
https://www.youtube.com/watch?v=936Kk8jDBAU&t=8s