|Summary: The story of &quot;A Butterfly Cup&quot; happened in the Ming dynasty (1368-1644). Lu Lin, the Viceroy of Huguang Province (today’s Hubei and Hunan Provinces and surrounding areas), had a son named Lu Shikuan, who ran amuck and stopped at no evil. During his visit in Guishan Mountain in Wuchang, (the then headquarters of Huguang and today's Wuchang District, Wuhan, Hubei), he whipped an old fisherman named Hu Yan to death. Tian Yuchuan, the son of Tian Yunshan, the magistrate of Jiangxia County (today's Jiangxia District, Wuhan, Hubei), happened to see such an injustice and hurried to the rescue, but he accidentally killed Lu Shikuan. Soon afterwards, Lu Lin gave an order to arrest Tian Yuchuan so as to take the revenge. Yuchuan ran to the river and met Hu Yan's daughter Hu Fenglian, who hid him in her boat and sent him away from Jiangxia County that very night. As a love token, Yuchuan gave Fenglian a cup printed with a butterfly, which he had inherited from his forefathers, and asked her to sue for an injustice in the county court. When Lu Lin held a joint trial, Fenglian broke in and beat the drum to voice her grievances. Just then, Lu Lin received an imperial edict which ordered him to lead his troop to fight against the alien invasion. Lu Lin was defeated in the frontier but was helped by Lei Quanzhou, Tian Yuchuan’s alias. They fought side by side and drove the invaders away. When Lu Lin returned to resume the trial, he discovered that the accused was none other than Tian Yuchuan, his lifesaver Lei Quanzhou, so he released Yuchuan. After so many hardships and sufferings, Yuchun and Fenglian got married and lived a happy life. The story, full of twists and turns and dramatic with coincidences, had a happy ending. It praised Tian Yuchuan as a chivalrous man who feared no violence and acted bravely in facing injustice. It also demonstrated the traditional Chinese moral value that “one good turn deserves another”.