The Legend of Sword and Fairy 3 and 4 were a role-playing game developed by a famous Chinese game development company, Tang Games, and released in 2005. In the game, players will play the role of the protagonist to explore the mysterious fantasy world and fight with various enemies to complete the mission and finally achieve the game goal. Jin Yong's Doujinshi referred to novels based on elements from the martial arts novels written by Mr. Jin Yong, such as Book of Swords, Gratitude and Revenge, and Heroes. These novels would usually connect the characters in Mr. Jin Yong's novels with other people or things to create a new story. Jin Yong's doujin novels were very popular in China, and many readers liked to see it as a way to create and explore the world of Jin Yong's novels.