An early martial arts novel was not written by Jin Yong and Gu Long

It's a martial arts novel I read about ten years ago. The female protagonist is called Gong something Yan, but I can't remember what the male protagonist's name is. They're from the same sect. The female protagonist is the male protagonist's senior sister. That's all I remember. It's not the work of masters like Jin Yong, Gu Long, or Liang Yusheng. If you know, please tell me. This is the first novel I've read in my life. I really want to reread it.