Is there a novel on QQ where the female protagonist kills people with a piano?

A very powerful martial arts emperor and a female protagonist who used the zither as a weapon. Later, the female protagonist became the imperial concubine and then ran to a very cold place to give birth to a child. The emperor seemed to be called Chen something. I saw it when I was studying in Tengxun. At that time, it was not over yet. If you know, please tell me.