Zhang Wuji is the main character in the popular Chinese martial arts novel "The Heaven Sword and Dragon Saber," written by Jin Yong. He is the son of Zhang Cuishan and Yin Susu and is known for his exceptional martial arts skills and strong sense of justice. Throughout the story, he navigates complex relationships and political intrigue within the martial arts world. Zhang Wuji's journey involves discovering his family's legacy and the secrets of powerful martial arts techniques, including the Nine Yang Manual. He becomes a leader of the Emei Sect and plays a crucial role in uniting various factions against common enemies, showcasing his growth from a naive youth to a wise and capable leader.