Birds fly over the Yalu River Wetland in Dandong, northeast China's Liaoning Province, April 24, 2015. A bird watching festival was launched on Friday at the Yalu River Wetland in Dandong. (Photo: Xinhua/Li Gang)
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Birds fly over the Yalu River Wetland in Dandong, northeast China's Liaoning Province, April 24, 2015. A bird watching festival was launched on Friday at the Yalu River Wetland in Dandong. (Photo: Xinhua/Li Gang)
