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| Siberian tigers enjoy themselves at a Siberian tiger artificial propagation center in Harbin, capital of northeast China's Heilongjiang Province, Jan. 14, 2010. By the end of 2009, the number of Siberian tigers has raised over 900 in the center, the world's largest Siberian tiger breeding center, and will reach 1000 in 2010. [Xinhua] |
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