A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)

A pair of giant pandas, Gonggong and Shunshun, enjoy food at the Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, on Aug. 22, 2021. The park holds celebrations for the two pandas’ eighth birthdays on Sunday. Their birthday cake is made of multicolored ice, bamboo shoots, fruits, etc. (Photo/Xinhua)