Photo taken on Jan. 3, 2017 shows a fog-bound street in Hefei, capital of east China's Anhui Province. A red alert for fog in large parts of China was issued by the National Meteorological Center on Tuesday. (Xinhua/Guo Chen)
Photo taken on Jan. 3, 2017 shows a fog-bound building in Hefei, capital of east China's Anhui Province. A red alert for fog in large parts of China was issued by the National Meteorological Center on Tuesday. (Xinhua/Guo Chen)
A citizen rides in the dense fog in Hefei, capital of Anhui province on Jan. 3, 2017. [Photo: Xinhua/Guo Chen]
Photo taken on Jan. 3, 2017 shows a view of fog-bound Wuxi City, east China's Jiangsu Province. A red alert for fog in large parts of China was issued by the National Meteorological Center on Tuesday. (Xinhua/Tang Yi)
A car runs in the fog-bound county seat of Runan, central China's Henan Province, Jan. 3, 2017. A red alert for fog in large parts of China was issued by the National Meteorological Center on Tuesday. (Xinhua/Sun Kai)
Pedestrians walk in fog-bound Lianyungang City, east China's Jiangsu Province, Jan. 3, 2017. A red alert for fog in large parts of China was issued by the National Meteorological Center on Tuesday. (Xinhua/Shao Shixin)
A photo shows the sky at 500 meters high of a town in Shandong province on Jan. 2, 2017. [CNSPHOTO/Zhao Yuguo]
A photo shows the sky at 500 meters high of a town in Shandong province on Jan. 2, 2017. [CNSPHOTO/Zhao Yuguo]
A photo shows the sky at 500 meters high of a town in Shandong province on Jan. 2, 2017. [CNSPHOTO/Zhao Yuguo]
A dustfall vehicle works on the road in Jinan, Shandong province on Jan. 2, 2017. [Photo: Xinhua/Guo Xulei]
A combined photo shows haze in Xi’an, Shaanxi province on Jan. 1-2, 2017. [Photo: Xinhua/Shao Rui]
A high-rise building is shrouded by mist in Yangzhou, Jiangsu province on Jan. 2, 2017. [Photo: Xinhua/Meng Delong]
Many freeways are closed for the heavy fog in Sichuan province on Jan. 2, 2017. [Photo: CNS/Liu Zhongjun]
Many freeways are closed for the heavy fog in Sichuan province on Jan. 2, 2017. [Photo: CNS/Liu Zhongjun]
Many freeways are closed for the heavy fog in Sichuan province on Jan. 2, 2017. [Photo: CNS/Liu Zhongjun]
Vehicles are trapped by heavy fog in Nanjing, Jiangsu province on Jan. 1, 2017. [Photo: Xinhua/Sun Can]
A highway exit is closed because of the dense fog in Shijiazhuang, Hebei province on Jan. 1, 2017. [Photo: Xinhua/Zhu Xudong]
A photo shows Temple of Heaven Park in Beijing on Dec. 31, 2016. [Photo: Xinhua/Jin Liangkuai]
A photo shows Beihai Park in Beijing on Dec. 31, 2016. [Photo: Xinhua/Lv Xun]
A photo shows Xidan business district in Beijing on Dec. 31, 2016. [Photo: Xinhua/Cheng Tingting]
这是12月31日拍摄的北京天坛公园祈年殿。2016年12月30日0时至2017年1月1日24时北京市启动空气重污染橙色预警。当日，全国多地遭遇雾霾天气，多个城市启动空气污染预警。 新华社记者 金良快 摄
A photo shows Temple of Heaven Park in Beijing on Dec. 31, 2016. [Photo: Xinhua/Jin Liangkuai]
A photo shows the Seventeen-Arch Bridge at Summer Palace in Beijing on Dec. 31, 2016. [Photo: Xinhua/Chen Jianli]
A photo shows the Seventeen-Arch Bridge at Summer Palace in Beijing on Dec. 31, 2016. [Photo: Xinhua/Chen Jianli]
A photo shows the haze in Beijing on Jan. 2, 2017. [Photo: CNS/Li Huisi]
A citizen runs with mask in Chaoyang Park, Beijing on Jan. 2, 2017. [Photo: CNS/Li Huisi]
Citizens walk with masks in Chaoyang Park, Beijing on Jan. 2, 2017. [Photo: CNS/Li Huisi]
A photo shows the haze in Beijing on Jan. 2, 2017. [Photo: CNS/Li Huisi]
Henan’s Zhengzhou is shrouded by fog and haze on Jan. 1, 2017. [Photo: Xinhua/Li Bo]
