Chinese officials granted Tai Shan, the National Zoo's popular giant panda cub, an extra two years at the Smithsonian Institution park with his parents. Under a panda loan agreement with China, any cub born at the National Zoo would be returned for breeding sometime after its second birthday. Tai Shan turns 2 on July 9 but will remain with his mother Mei Xiang and father Tian Tian at least until 2009. Chinese Ambassador Zhou Wenzhong presented the zoo with a giant green laminated passport to extend Tai Shan's stay. "As an envoy of goodwill from the Chinese people and a symbol of friendly cooperation between China and the United States, Tai Shan will continue to bring more happiness and delight to the American people," Wenzhong said.