Chinese artist Kong Ning walks in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in front of the Drum tower in a historical part of Beijing on a very polluted day December 7, 2015. Kong, whose works include themes related to China's air pollution problem, named her new performance “The Orange Horns Bride Marries the Blue Sky” and presented it dressed in orange, the colour of the second highest pollution alert level issued again in Beijing as hazardous smog blankets the capital. (Photo by Damir Sagolj/Reuters)





Chinese artist Kong Ning walks in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in front of the Drum tower in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





Chinese artist Kong Ning walks through a historical part of Beijing in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





Chinese artist Kong Ning walks through a historical part of Beijing in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





Chinese artist Kong Ning symbolically makes warning sounds in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in front of the Drum tower in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





Assistants help Chinese artist Kong Ning with her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





A man pushes his tricycle in front of Chinese artist Kong Ning in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





Passers-by take pictures of Chinese artist Kong Ning in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in front of the Drum tower in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





Chinese artist Kong Ning symbolically yells in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)





A man wearing a protective mask looks from inside a bus as Chinese artist Kong Ning walks in her costume made of hundreds of orange plastic blowing horns during her art performance raising awareness of the hazardous smog in a historical part of Beijing on a very polluted day December 7, 2015. (Photo by Damir Sagolj/Reuters)