About the film
Under the Dome is a 2015 self-financed Chinese documentary by Ming Fan and Chai Jing, a former China Central Television journalist, concerning air pollution in China. It was viewed over 150 million times on Tencent within three days of its release, and had been viewed a further 150 million times by the time it was taken offline four days later.
From the film's Wikipedia article (CC BY-SA 4.0).