Siberian tiger quadruplets play at Yunnan Wild Animal Park in Kunming, southwest China's Yunnan Province, May 3, 2022. The one-month-old Siberian tiger quadruplets greet visitors at Yunnan Wild Animal Park during the Labor Day holiday. (Xinhua/Jiang Wenyao)

Siberian tiger cubs play at Yunnan Wild Animal Park in Kunming, southwest China's Yunnan Province, May 3, 2022. The one-month-old Siberian tiger quadruplets greet visitors at Yunnan Wild Animal Park during the Labor Day holiday. (Xinhua/Jiang Wenyao)

Siberian tiger cubs rest at Yunnan Wild Animal Park in Kunming, southwest China's Yunnan Province, May 3, 2022. The one-month-old Siberian tiger quadruplets greet visitors at Yunnan Wild Animal Park during the Labor Day holiday. (Xinhua/Jiang Wenyao)

Siberian tiger quadruplets play at Yunnan Wild Animal Park in Kunming, southwest China's Yunnan Province, May 3, 2022. The one-month-old Siberian tiger quadruplets greet visitors at Yunnan Wild Animal Park during the Labor Day holiday. (Xinhua/Jiang Wenyao)

Siberian tiger quadruplets play at Yunnan Wild Animal Park in Kunming, southwest China's Yunnan Province, May 3, 2022. The one-month-old Siberian tiger quadruplets greet visitors at Yunnan Wild Animal Park during the Labor Day holiday. (Xinhua/Jiang Wenyao)