Giant panda "Hua Ao" is fed with a moon cake at the Yantai Zoo in Yantai, east China's Shandong Province, Sept. 12, 2011. Giant pandas "Qing Feng" and "Hua Ao" enjoyed moon cakes made of eight delicacies including corn flour, soybean powder, bamboo powder, eggs and apples at the zoo on Monday, to celebrate the Mid-Autumn Festival, which falls on Sept. 12 this year. [Xinhua]