Chang released the medium length documentary, Earth to Mouth, in 2002 with the National Film Board of Canada.[3] It revolves around migrant Mexican worker working on a Chinese operated farm in south-east Ontario.
Chang released his first feature length documentary, Up the Yangtze in 2007. The film highlights the repercussions of building the Three Gorges Dam and the economic effect on rural families.[4] It was one of the top-grossing documentary box office releases in 2008[4] and garnered numerous awards, including the 2008 Golden Horse Award for Best Documentary.[5]
Chang released his sophomore film, China Heavyweight, in 2012. It is about a boxing coach and his two students in rural China fighting to become amateur and professional champions. The film premiered at Sundance 2012 in the World Documentary competition. Like its predecessor, China Heavyweight also won the Golden Horse Award for Best Documentary in 2012.[6]
In the same year, Chang also completed The Fruit Hunters, a feature documentary about exotic fruit cultivators, preservationists, and the history of fruits. The Fruit Hunters premiered at the International Documentary Festival (IDFA) in Amsterdam and the Berlinale Film Festival in 2013. It won the Best Film award at the 2013 Environmental Film Festival in Paris.[7]
His documentary short, Gatekeeper, was released in 2016 and is streaming on Field of Vision, Laura Poitras' curated online film unit.[8] It centers around retired police officer, Yukio Shige, and his work on preventing suicides around Tōjinbō, an infamous location for suicides in Japan.[9]Gatekeeper won Best Short Documentary at the LA Film Festival in 2016, qualifying for the Oscars.
Chang released Pandemic19 co-directed with his wife, Annie Katsura Rollins, executive produced by Jean Tsien, edited by Xi Feng and lensed by Derek Howard. The film won two awards at the 2020 Hot Springs Documentary Film Festival for Best Documentary Short Special Jury Mention and the Matt DeCample Audience Choice Award Short. The jury wrote: "PANDEMIC19 is a poignant document of the factual and emotional details of Covid-19 as seen through the eyes of three American frontline doctors. Smartly utilizing the doctors own video testimonials, this film feels alive and immediate while we remain so disconnected."[11]
Narrative
Chang wrote the neo-noir romantic screenplay for Eggplant《茄子》, his first narrative feature, about a wedding photographer's happenstance encounter with his swindler ex-girlfriend.[12] The project was selected to participate in the Sundance Institute Director and Screenwriters Lab in 2015.[8][13]
Influences
Chang is a fan of cinéma vérité, taking influences from films released by the National Film Board of Canada in the 1950s and 1960s, such as Lonely Boy (film),[14] and Allan King's "actuality drama" filmography.[2]