Liu Chen and Ruan Zhao's Encounter with Immortals tells the story of two herbalists during the Eastern Han Dynasty who, after getting lost, accidentally stumble into a realm of immortals. There, they meet beautiful fairies and spend what feels like several years. Upon their return to the human world, they discover that a thousand years have passed. This tale is not only filled with fantastical elements but also sparks various speculations about time tunnels. Modern science suggests the possibility of a vast time tunnel that could allow individuals to experience long stretches of time in a void. However, these mysterious phenomena remain unsolved enigmas to this day.