Ask for the name of a fantasy novel

The opening plot of the novel was that the male protagonist had obtained a treasure that everyone dreamed of. After other sects learned about it, they came to threaten the male protagonist to hand over the treasure and wanted to take it for themselves. There were many famous sects such as Buddhism who could not resist the temptation of the treasure. After a fight, the male protagonist began to curse at these sects. In the end, he bid farewell to the female protagonist beside him and jumped off the cliff to commit suicide. The female protagonist was the daughter of the leader of the sect. After seeing the ugly faces of those people, she jumped off the cliff with the male protagonist to commit suicide. I read it in high school many years ago, so I don't remember much. I only vaguely remember the opening plot. I've been thinking about it these few days. If there's anyone who knows, please tell me. Thank you!