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Several swans are seen at Gaotai section of Heihe River in northwest China's Gansu Province, on Jan. 2, 2009. As the protection of Heihe wetland increased in Zhangye of Gansu Province, more and more migrant birds including 200 swans arrived at Gaotai section of Heihe River for the winter.[Photo: Xinhua]
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![Several swans are seen at Gaotai section of Heihe River in northwest China's Gansu Province, on Jan. 2, 2009. As the protection of Heihe wetland increased in Zhangye of Gansu Province, more and more migrant birds including 200 swans arrived at Gaotai section of Heihe River for the winter.[Photo: Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090107/000d87ad3cdd0acea83d0c.jpg "Several swans are seen at Gaotai section of Heihe River in northwest China's Gansu Province, on Jan. 2, 2009. As the protection of Heihe wetland increased in Zhangye of Gansu Province, more and more migrant birds including 200 swans arrived at Gaotai section of Heihe River for the winter.[Photo: Xinhua]")
