"The Hero in Green Shirt" is the masterpiece of Gong Baiyu, a master of martial arts in the Republic of China, and is considered a double masterpiece together with "The Twelve Golden Darts". Different from the usual absurd narratives about the adventures of the swordsman, Mr. Bai Yu opened up another side of the martial arts world with his cold and sharp realistic writing style. The story focuses on a young chivalrous man who lives at the bottom of society. He is dressed in a green shirt. He is not casual and unrestrained, but has experienced the warmth and coldness of the world. In the turbulent rivers and lakes disputes, there are no magical skills with powerful hands and eyes, only hard work with difficulty; there are no fairies who do not eat fireworks, only real and vivid human struggles. With a strict structure and profound psychological portrayal, the book describes the embarrassment and helplessness behind the halo of heroes, and expresses the difficulty of blood in the hot and cold world. It is a classic masterpiece that brings martial arts back to the world and touches the soul.