Breeders feed the giant panda twins "Qing Qing" and "Bing Bing" with a special birthday cake at the China Conservation and Research Center for Giant Pandas in Dujiangyan City, southwest China's Sichuan Province, Aug. 18, 2017. Giant panda twins "Qing Qing" and "Bing Bing" celebrated their second birthday Friday. (Xinhua/Yang Jin)
