The introduction of the Nine Blades Killer series is as follows: " King of Assassins " was a wuxia novel by Nine Blades. It told the story of a young professional assassin, Lin Qingyi, who grew up. Lin Qingyi met a mysterious old man during one of his missions. The old man told him that his fate had been decided. He could only become the real King of Assassins by cultivating continuously. Hence, Lin Qingyi began his journey of cultivation. He constantly challenged himself and broke through his limits to become a top-notch assassin. In addition to King of Assassins, Nine Blades also created three sequels, King of Assassins 2: Dark Battle, King of Assassins 3: Escape, and King of Assassins 4: Death Game. These works were full of suspense, horror, and battle elements, presenting a picture of the world of professional killers. The series won the love of readers with its rich imagination, profound character creation and thrilling plot.