Tourists boat in Wanquan River of Qionghai city, South China's Hainan Province, August 5, 2013. (Xinhua/Meng Zhongde)

A citizen fishes by the riverside of Wanquan River in Qionghai City, south China's Hainan Province, Aug. 5, 2013. (Xinhua/Meng Zhongde)

A couple watch sunset glow by the riverside of Wanquan River in Qionghai City, south China's Hainan Province, Aug. 5, 2013. (Xinhua/Meng Zhongde)

A tourist watches sunset glow by the riverside of Wanquan River in Qionghai City, south China's Hainan Province, Aug. 5, 2013. (Xinhua/Meng Zhongde)

Photo taken on Aug. 5, 2013 shows the sunset in Qionghai City, south China's Hainan Province. (Xinhua/Meng Zhongde)