A Siberian tiger looks around at a tiger park as snow falls in the city of Hailin in northeast China's Heilongjiang Province on Thursday, April 18, 2019. [Photo: Xinhua]

Two Siberian tigers socialize at a tiger park as snow falls in the city of Hailin in northeast China's Heilongjiang Province on Thursday, April 18, 2019. [Photo: Xinhua]

​Siberian tigers look around at a tiger park as snow falls in the city of Hailin in northeast China's Heilongjiang Province on Thursday, April 18, 2019. [Photo: Xinhua]