This aerial photo taken on April 1, 2016 shows Baiyulan Plaza shrouded in fog in Shanghai, east China. Shanghai issued an orange alert for fog on Friday. (Photo: Xinhua/Cheng Xugang)
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This aerial photo taken on April 1, 2016 shows Baiyulan Plaza shrouded in fog in Shanghai, east China. Shanghai issued an orange alert for fog on Friday. (Photo: Xinhua/Cheng Xugang)
