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Tiger conservation experts set up an infrared camera during a Siberian tiger conservation skill contest in Suifenhe, northeast China's Heilongjiang Province, March 5, 2018. (Xinhua/Wang Kai)

Tiger conservation experts set up an infrared camera during a Siberian tiger conservation skill contest in Suifenhe, northeast China's Heilongjiang Province, March 5, 2018. (Xinhua/Wang Kai)