Ba Si gets a birthday cake from her keeper yesterday at the Panda World in Fuzhou, southeast China’s Fujian Province. The 37-year-old giant panda, prototype for the mascot of the 1990 Beijing Asian Games, is the world’s oldest panda in captivity. She visited America’s San Diego Zoo in 1987 where her acrobatic performances attracted 2.5 million visitors during her six-month stay. Previous record holder Jia Jia, 38, was put to sleep in Hong Kong in October after her health deteriorated.