You Xian Ku
You Xian Ku or Youxian ku (Chinese: 遊仙窟 ; translated as "A Visit to a Fairy Cave", "Cavern of the Disporting Fairies" or "Journey to the Immortals' Grotto") is a Chinese tale from the Tang dynasty, written by Zhang Zhuo (張鷟, also known as Zhang Wencheng 張文成) (658–730). It is one of the most noted works of chuanqi fiction (唐人傳奇).
The text, depends on the editions, has around 12,500 characters, making it one of the longer early Tang chuanqi literature. The text's composition has been dated to between 681 and 684 in the late 7th-century.