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Photo taken on Jan. 16, 2018 shows a skyscraper shrouded in fog in Lujiazui of Shanghai, east China. Shanghai issued an orange alert for fog Tuesday morning. (Xinhua/Shen Chunchen)
Photo taken on Jan. 16, 2018 shows a skyscraper shrouded in fog in Lujiazui of Shanghai, east China. Shanghai issued an orange alert for fog Tuesday morning. (Xinhua/Shen Chunchen)