Seeking the name of a martial arts novel

A wuxia novel I read a long time ago. I only read a part of it but it left a deep impression on me. My memory is very vague but I want to find it and read it again. I don't know the name.
There was a strange person in the novel who kept singing a poem. There was a big secret hidden in this poem. I only vaguely remembered one sentence, but I don't know if it's right or not.
It seems to be these words. I really can't get up.

Answer 1

The name of this wuxia novel was " Sword Aura ". This was a classic novel that described the grudges between martial artists. The main character was a young man named Li Xiaoyao. He used a mysterious sword to walk in the martial arts world and engage in fierce battles with various evil forces. The plot of this novel was full of ups and downs, and the characters were vivid. It was hailed as a classic work of martial arts novels.