harbin

Laborers walk at a large snow sculpture ahead of the Harbin International Ice and Snow Festival in the northern city of Harbin, Heilongjiang province, China, January 5, 2016. REUTERS/Aly Song

Aly Song/Reuters

Laborers walk at a large snow sculpture ahead of the Harbin International Ice and Snow Festival in the northern city of Harbin, Heilongjiang province, Chinaon Monday.

People look around ice sculptures ahead of the Harbin International Ice and Snow Festival in the northern city of Harbin, Heilongjiang province, January 4, 2016.

Aly Song/Reuters

People look around ice sculptures ahead of the Harbin International Ice and Snow Festival in the northern city of Harbin, Heilongjiang province on Monday

A traffic policeman signals to drivers during a smoggy day in Harbin, Heilongjiang province, October 21, 2013. The second day of heavy smog with a PM 2.5 index has forced the closure of schools and highways, exceeding 500 micrograms per cubic meter on Monday morning in downtown Harbin, according to Xinhua News Agency.

China Daily/Reuters

A traffic policeman signals to drivers during a smoggy day in Harbin, Heilongjiang Province. The second day of heavy smog forced the closure of schools and highways on Monday, according to Xinhua News Agency.