Is there anyone called Duan Ziyu in Jin Yong's Wuxia?

Recently, I read a book called Nine Yin and Nine Yang. It is called Jin Yong's new book. In the book, there is a man named Duan Ziyu who is a martial artist. He is not only skilled in Nine Yang Divine Skill, but also mastered the Nine Yin Sutra. He also has the One Yang Finger, Six Meridians Divine Sword, and the Nine Swords Beyond the Swords. He calls the whole martial arts world to obey him. Moreover, his surname is Duan, and he is the descendant of the authentic Dali Dynasty Duan family. He is the master of the Huashan Sect, Feng Qing Yang. Feng Qing Yang's Nine Swords Beyond the Swords was taught by this person. What I want to ask is, does Jin Yong really have such a new book? There is also a book called the continuation of the Nine Yin and Nine Yang, called the hero Feng Qing Yang Ci. The two books are sandwiched between the chair and the dragon and the smiling and arrogant Jianghu. It is simply a good thing. I saw that the first printing of this book was in the 80's, which made people feel that it was really Jin Yong's new book.