Gouyu is the Nine Heavenly Gouyu, a character in the novel Black Moonlight Take Steady BE Script and its spin-offs by Vine for the Branch, with the identity background of a Divine Artifact, an ancient jade that was born and raised in the earth.

Black Moonlight Take Steady BE Script is a time-travel genre novel, which has been adapted into the film and television drama Long Moon Ashes Ming, which tells the story of Su Li Li and Tantai Ashes' redemption of each other.