Old articles from a few years ago, recently started to be restored and updated.
Wuling Creek
That is Wulingyuan. The paradise in Tao Yuanming's "Peach Blossom Spring". It also uses the story of Liu Chen and Ruan Zhao from the Eastern Han Dynasty who went to Tiantai Mountain to collect medicine.
Liu Chen and Ruan Zhao of the Eastern Han Dynasty went to Tiantai Mountain and were lost and could not return. They were hungry and ate peaches. They searched for water and found a big stream. They met a fairy by the stream and were given money to stay. When he came out, he had gone through seven lives and returned, not knowing where he was. An allusion often cited by later writers. See Volume 41 of "Taiping Yulan" quoted from "Youming Lu" by Liu Yiqing of the Southern Song Dynasty. Tang Wang Zhihuan's "Melancholy Poems" No. 10: "The journey back in the morning has been lost, and the green peach blossoms are withered by Wuling River." The third chapter of Yuan Mingshi's "Cuo Lang Dan": "Many tubes are a few pieces of broken flowers, and Liu Chen was fascinated by Wulingyuan." The first chapter of Yuan Zengrui's "The Story of Leaving Shoes": "We are destined to meet each other thousands of miles away, and Liu Chen once entered Wuling River." Tang Xianzu of the Ming Dynasty wrote in "The Peony Pavilion? Looking for Dreams": "Why is it that the real jade has returned to Wulingyuan? Or it is just water drops and flowers flying in front of my eyes."
The text takes the meaning of "not existing in the world".