Visitors walk at the fog-enveloped Temple of Heaven in Beijing, capital of China, January 12, 2013. Heavy fog hit Beijing on Saturday. Photo: Xinhua
Two visitors wearing masks are seen at the fog-enveloped Temple of Heaven in Beijing, capital of China, January 12, 2013. Heavy fog hit Beijing on Saturday. Photo: Xinhua
Fog-shrouded buildings are seen in the Honggutan New District of Nanchang City, capital of east China's Jiangxi Province, January 12, 2013. A fog hit many parts of Jiangxi on Saturday. Photo: Xinhua
A citizen walks her dog amid dense fog in Nanchang City, capital of east China's Jiangxi Province, January 12, 2013. A fog hit many parts of Jiangxi on Saturday. Photo: Xinhua
A citizen rides amid dense fog in Nanchang City, capital of east China's Jiangxi Province, January 12, 2013. A fog hit many parts of Jiangxi on Saturday. Photo: Xinhua
Fog-shrouded buildings are seen in the Honggutan New District of Nanchang City, capital of east China's Jiangxi Province, January 12, 2013. A fog hit many parts of Jiangxi on Saturday. Photo: Xinhua
Citizens ride amid dense fog on a street in the Qingshanhu District of Nanchang City, capital of east China's Jiangxi Province, January 12, 2013. A fog hit many parts of Jiangxi on Saturday. Photo: Xinhua
Buildings are seen amid dense fog in Wuhan City, capital of central China's Hubei Province, January 12, 2013. Photo: Xinhua
Buildings are seen amid dense fog in Wuhan City, capital of central China's Hubei Province, January 12, 2013. Photo: Xinhua
Buildings are seen amid dense fog in Wuhan City, capital of central China's Hubei Province, January 12, 2013. Photo: Xinhua
Buildings are seen amid dense fog in Wuhan City, capital of central China's Hubei Province, January 12, 2013. Photo: Xinhua
Buildings are seen amid dense fog in Wuhan City, capital of central China's Hubei Province, January 12, 2013. Photo: Xinhua