Photo taken on Nov. 14, 2016 shows buildings shrouded in fog in Rizhao, east China's Shandong Province. The National Meteorological Center (NMC) issued an orange warning for heavy fog in east and central China on Monday. (Xinhua/Liu Mingzhao)

Photo taken on Nov. 14, 2016 shows buildings shrouded in fog in Rizhao, east China's Shandong Province. The National Meteorological Center (NMC) issued an orange warning for heavy fog in east and central China on Monday. (Xinhua/Liu Mingzhao)

Photo taken on Nov. 14, 2016 shows ships shrouded in fog in Huai'an, east China's Jiangsu Province. The National Meteorological Center (NMC) issued an orange warning for heavy fog in east and central China on Monday. (Xinhua/Zhou Haijun)