Hi, I watched this Chinese historical fantasy (probably wuxia? not too sure, rarely watch dramas) drama a few years ago. I don't remember much about it to be honest, other than the lead female has this power where when she plays a music instrument (a guzheng, if my memory serves me correctly) she can hurt people. I also remember her male counterpart having a mother who is a magical creature of some sort, like a mermaid or something. I think the female lead's father was evil and used her powers to his advantage. If anyone knows the name, I'd be grateful!
