Abstract: In Qing Dynasty,in Chen Shanggu's catalog of ancient works Mao,Kun's third son Mao Biao's creation Qi Yu Zhuan has been considered as a novel lost,through research we can know that in fact this book is not lost,it was compiled in Ming Dynasty popular books of classical Chinese novel titled Tianyuan Qiyu.The key to explore this koan is crack which is established by the author use their name riddle:Mao Biao is a pseudonym of MaoGong(later renamed GuoShou)who is MaoKun's third son.Because his own surname “Mao”(茅)sounds the same as “Mao”(毛),“Gong” from “Yu Gong”(禹贡),and BaiJiaXin have a idiom “Qi Mao Yu Di”,as the protagonist named “Qi Yu”,and on the two homonym “adventure”;and according to the “Deyourumao” of ShiJing,named “ZiYou” intends to Qi Yu,according to “You Che Luan Biao” of ShiJing,named himself “Biao”and “YouLuan”.The archetype for the author when the eldest brother Mao Wengji,the creation time should be in Wanli ten years(1582)soon after Mao Wengji die in prison.The significance of the creation of works should be derived from the author's elder brother was framed by sex and caused the tragedy,in the work surface of the erotic description,showing an attitude at trying to get rid of the dilemma of Mao Wengji event;and the erotic description also have great influence in late Ming Dynasty novels,at the same time reflects the conflict between desire and ethics in late Ming dynasty.

Key words: Qi Yu Zhuan, Tianyuan Qiyu, Qi Yudi, Mao Biao, MaoGong, Mao Guoshou, Mao Wengji