Zhang O was born in China and since 2004 lives and works in New York and Beijing. She graduated from the Central Academy of Art in Beijing and the Royal College of Art in London. In Horizon, O Zhang photographed young girls of a rural village who appear to be between five and seven years old. The idea for the project came from her experience during the Cultural Revolution when she and her parents, who were intellectuals, were sent for reeducation to a remote village in Jihou Hunan province.