Turtle City

A city, a turtle. The turtle lies beneath the city, and the city rests on its back. When the turtle moves, heaven and earth are overturned; when it rests, plants and trees endure for ages. Every four years, a Daoist surnamed Gu would jump into a deep well. They kept doing so for four hundred years, until the last one, the mad Daoist Gu, who had never married or had children, refused to jump into the well again... He kept luring greedy people into the depths, telling them the well held endless treasure. College student Zhang Jiayuan returned home, and then set out to uncover the secret of Turtle City.