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Photo taken on Sept. 2, 2014 shows a staff member observing waterfowls through a telescope at the lake of Gahai in Luqu county of Gannan Tibetan autonomous prefecture, Northwest China's Gansu province. The Gahai Wetland, a source area of China's Yellow River, is growing in both water area and waterfowl numbers since the establishment of a national natural reserve in 2002. |
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