Photo taken on August 5, 2013 shows the red clouds in the sky over Yangzhou, East China's Jiangsu Province. (Xinhua/Meng Delong) 

Photo taken on Aug. 5, 2013 shows the red clouds in the sky over Yangzhou, East China's Jiangsu Province. (Xinhua/Meng Delong) 

Photo taken on Aug. 5, 2013 shows the red clouds in the sky over Yangzhou, East China's Jiangsu Province. (Xinhua/Meng Delong) 

Photo taken on Aug. 5, 2013 shows the red clouds in the sky over Yangzhou, East China's Jiangsu Province. (Xinhua/Meng Delong) 

Photo taken on Aug. 5, 2013 shows the red clouds in the sky over Yangzhou, East China's Jiangsu Province. (Xinhua/Meng Delong) 

Photo taken on Aug. 5, 2013 shows the red clouds in the sky over Yangzhou City, east China's Jiangsu Province. (Xinhua/Meng Delong)