Giant panda Gonggong prepares to enjoy food at Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, Aug. 27, 2020. The park held celebrations for the seventh birthday of two giant pandas on Thursday. Photo:Xinhua

Giant panda Gonggong enjoys a birthday cake at Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, Aug. 27, 2020. The park held celebrations for the seventh birthday of two giant pandas on Thursday. Photo:Xinhua

Giant panda Shunshun enjoys food at Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, Aug. 27, 2020. The park held celebrations for the seventh birthday of two giant pandas on Thursday.Photo:Xinhua

Giant panda Shunshun enjoys food at Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, Aug. 27, 2020. The park held celebrations for the seventh birthday of two giant pandas on Thursday.Photo:Xinhua

Giant panda Shunshun enjoys a birthday cake at Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, Aug. 27, 2020. The park held celebrations for the seventh birthday of two giant pandas on Thursday. Photo:Xinhua

Giant panda Shunshun enjoys food at Hainan Tropical Wildlife Park and Botanical Garden in Haikou, south China's Hainan Province, Aug. 27, 2020. The park held celebrations for the seventh birthday of two giant pandas on Thursday.Photo:Xinhua