Born 1978 in Tianshu (Gansu), Cai Dongdong joined the People's Liberation Army at a young age as a portrait photographer for enlisted soldiers. Graduated from the Beijing Film Academy in 2002, Cai received awards including the 3rd Premio Terna Contemporary Art Award in 2010 and Pingyao International Photography Festival Outstanding Photographer Creation Fund Award in 2005. His works were extensively exhibited in China and overseas including Scripts of the Bodies (Three Shadows Photography Art Centre, China, 2016); CHINA 8 – Works in Progress (Museum Folkwang, Germany, 2015); (+150) Visione: Origine a Potere: Energia Attraverso Le Generazioni (Multimedia Art Museum, Russia, 2012) and Image, History, Existence, Taikang Life 15th Anniversary Art Collection Exhibition (National Art Museum of China, China, 2011).
Cai's work is collected by China Central Academy of Fine Arts, Guangdong Museum of Art and Three Shadows Photography Art Centre in China; Multimedia Art Museum in Russia; and UNIDEE Art Foundation in Italy.
Cai currently lives and works in Beijing, China.