Siberian tigers rest at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 27, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)

Siberian tigers rest at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 28, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)

A Siberian tiger enjoys itself in the water at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 28, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)

Siberian tigers frolic in water at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 28, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)

A Siberian tiger cools itself in water at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 28, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)

A Siberian tiger rests at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 28, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)

Siberian tigers rest at Hengdaohezi Siberian Tiger Park in Hailin, northeast China's Heilongjiang Province, July 27, 2020. Siberian tigers in the park have lessened their activities and took various ways to cool off in the midsummer. (Xinhua/Wang Jianwei)