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A whooper swan flies above a lake in Rongcheng, east China's Shandong Province, December 28, 2008. Having nearly 10,000 migrating whooper swans every winter, Rongcheng becomes a famous place for whooper swans to spend winter. The Rongcheng Nature Reserve covers an area of 1,675 hectares. The nature reserve is built to protect everglade and birds that are in danger. [Xinhua]
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