As noted on this blog on March 7, 2015, China's websites began deleting copies of Chai Jing's (柴静) video about China's air pollution problem "Under the Dome" (穹顶之下).
Then, on the morning of March 8, 2015, Sina Weibo began censoring search results for "Under the Dome," telling users searching for that term: "In accordance with relevant laws, regulations, and policies, search results for 'Under the Dome' have not been displayed" (根据相关法律法规和政策，“穹顶之下”搜索结果未予显示).
The video was originally posted on March 1, 2015, on the People’s Daily website as a special feature entitled: “Chai Jing’s Investigation: Under the Dome.” (柴静调查：穹顶之下)
This video was taken on March 8, 2015, and shows that the entire web page - originally available here: http://tv.people.com.cn/GB/28140/394082/- and all pages that it linked to, had been deleted.
Then, on the morning of March 8, 2015, Sina Weibo began censoring search results for "Under the Dome," telling users searching for that term: "In accordance with relevant laws, regulations, and policies, search results for 'Under the Dome' have not been displayed" (根据相关法律法规和政策，“穹顶之下”搜索结果未予显示).
The video was originally posted on March 1, 2015, on the People’s Daily website as a special feature entitled: “Chai Jing’s Investigation: Under the Dome.” (柴静调查：穹顶之下)
This video was taken on March 8, 2015, and shows that the entire web page - originally available here: http://tv.people.com.cn/GB/28140/394082/- and all pages that it linked to, had been deleted.