Jia Jia, a female panda turning 37, enjoys her food in south China's Hong Kong, July 28, 2015. Officially recognized as the "Oldest panda ever in captivity" and "Oldest Panda living in capativity" by Guinness World Records, Jia Jia celebrated her 37th birthday in Hong Kong Ocean Park along with three other pandas on Tuesday. (Xinhua/Lyu Xiaowei)