Revised Story
She left the book and went away. He thought she was relieved and hadn't found her for ten years. He became the leader of the martial arts alliance, married another man to hide his identity, but his sweetheart was her. She died of illness because of his wedding, and all he found was her tomb, which turned old overnight.
She is actually a princess who gave up her glory and glory for him, but due to a misunderstanding, love turns to hatred and she plots revenge. On their wedding night, she stabbed him in the heart with a sword, and he died with a smile on his face.
It turned out that he had known her identity for a long time, and he deliberately distanced himself because he was afraid that she would suffer, and he fought for the position just to be worthy of her. A misunderstanding caused by deep love ended up being separated by life and death, and love and hate became empty.