Chai Jing who once worked as a journalist of China Central Television. Now, she is more popular with Chinese people. Because she presented a self-funded documentary about smog in Beijing, Feb 28, 2015. She made the documentary inspire by her sick daughter who was diagnosed(诊断) with a tumor （肿瘤）as a fetus（胎儿） and have an operation as a new-born baby.
"I saw smog through my daughter's eyes," Chai said while presenting her film. She recounted
how the little girl was confined indoors, patting the window to vent her frustration at being unable to play outside.
Chai said she hopes the 103-minute film will serve as an answer to three questions about
smog – what is smog, where does it come from and what to do about it.
"Under the Dome", The smog documentary was made by Chai Jing has been watched more than 17 million times on Youku and has become a popular discussion in the whole country and many people discuss on online, too.

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