![Siberian tigers socialize at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/a13523893efd4a21ac6a83f89e1c6f48.jpg)
Siberian tigers socialize at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![Two Siberian tigers socialize with one another at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/84ee6aad822447259f808d31abd9d91d.jpg)
Two Siberian tigers socialize with one another at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![Siberian tigers look around at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/d44997890d7d4aee90f5adb3f6730579.jpg)
Siberian tigers look around at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![A Siberian tiger looks around at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/266ccd6ab5874fbbbeb46c3dd1ed81fe.jpg)
A Siberian tiger looks around at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![A Siberian tiger yawns at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/c1e28c2b2a4248409a37a52695f33229.jpg)
A Siberian tiger yawns at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![Two Siberian tigers take a rest at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/6c03ff4fbd954e9b88e8ca5c53265439.jpg)
Two Siberian tigers take a rest at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![A Siberian tiger takes a rest at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/99eeea8a6b0b498199930d22d4ac83ea.jpg)
A Siberian tiger takes a rest at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![A Siberian tiger takes a rest at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/c9a44b4da85148bf83ad187a1418bfa1.jpg)
A Siberian tiger takes a rest at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![Siberian tigers look around at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/69a783c381554e008c23e6543825649c.jpg)
Siberian tigers look around at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![Two Siberian tigers socialize with one another at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/c4b97444cab04baea6a946cd9b1e3cc2.jpg)
Two Siberian tigers socialize with one another at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)
![Siberian tigers take a rest at a tiger park as snow falls in Hailin, northeast China\'s Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)](http://www.ecns.cn/hd/2019/04/19/d7bbd1008375498f951c5f9d571d06e9.jpg)
Siberian tigers take a rest at a tiger park as snow falls in Hailin, northeast China's Heilongjiang Province, April 18, 2019. (Xinhua/Wang Jianwei)