Visitors wearing face masks against pollution take pictures of themselves at the temple fair at Ditan Park (the Temple of Earth) as the Lunar New Year of the Rooster is celebrated in Beijing

Visitors wearing face masks against pollution take pictures of themselves at the temple fair at Ditan Park (the Temple of Earth) as the Lunar New Year of the Rooster is celebrated, in Beijing, China January 28, 2017. REUTERS/Damir Sagolj