Zheng Zhengyin's masterpiece of martial arts is famous for its rigorous description of martial arts and its real atmosphere of martial arts. The novel tells the story of Wang Daoan, the famous martial arts legend "Eagle Claw King", who relied on his superb eagle claw skills and extraordinary courage to deal with various major forces in the complicated rivers and lakes disputes, and finally established his status in the martial arts. Different from the later romantic martial arts, this book has a very realistic description of boxing styles, weapons, formations and rules of the martial arts, and is known as a classic of "hard-core martial arts". Reading this book can give you a glimpse of the social structure and martial arts style of the real martial arts in the late Qing Dynasty and the early Republic of China.