36-year-old giant panda Jia Jia, walks into a cage where health checkups are performed, at the Hong Kong Ocean Park, China July 9, 2015. Jia Jia, the oldest giant panda living in captivity, is set to challenge the world record for the animals' longevity, with her age said to put her on par with a human centenarian. (Photo by Tyrone Siu/Reuters)

36-year-old giant panda Jia Jia, is seen on a live screen (top) as she sleeps in her enclosure at the Hong Kong Ocean Park, China June 30, 2015. (Photo by Tyrone Siu/Reuters)

36-year-old giant panda Jia Jia, sits in her enclosure at the Hong Kong Ocean Park, China July 9, 2015. (Photo by Tyrone Siu/Reuters)

36-year-old giant panda Jia Jia looks on at the Hong Kong Ocean Park, China July 9, 2015. (Photo by Tyrone Siu/Reuters)

A visitor poses in front of a giant panda habitat at the Hong Kong Ocean Park, China June 25, 2015. (Photo by Tyrone Siu/Reuters)

36-years-old giant panda Jia Jia, walks in her enclosure at the Hong Kong Ocean Park, China July 9, 2015. (Photo by Tyrone Siu/Reuters)

36-year-old giant panda Jia Jia, eats on a scale at the Hong Kong Ocean Park, China July 9, 2015. (Photo by Tyrone Siu/Reuters)

A breeder poses with fruits and specially made high-fibre bread, for 36-year-old giant panda Jia Jia, at the Hong Kong Ocean Park, China June 30, 2015. (Photo by Tyrone Siu/Reuters)

36-year-old giant panda Jia Jia, sits in her enclosure at the Hong Kong Ocean Park, China July 9, 2015. (Photo by Tyrone Siu/Reuters)

A blood sample is drawn from giant panda Le Le, 10, by a veterinarian during a routine health check at the Hong Kong Ocean Park, China June 30, 2015. (Photo by Tyrone Siu/Reuters)

A veterinarian examines giant panda Le Le, 10, during a routine health check at the Hong Kong Ocean Park, China June 30, 2015. (Photo by Tyrone Siu/Reuters)

Giant panda Le Le, 10, looks out from his enclosure after a routine health check at the Hong Kong Ocean Park, China June 30, 2015. Pandas are endangered because most of their natural habitat has been destroyed for timber, farming and construction, according to conservation group the World Wildlife Fund. (Photo by Tyrone Siu/Reuters)

A veterinarian fills a test tube with blood drawn from giant panda Le Le, 10, during a routine health check at the Hong Kong Ocean Park, China June 30, 2015. (Photo by Tyrone Siu/Reuters)

36-year-old giant panda Jia Jia, looks on at the Hong Kong Ocean Park, China July 9, 2015. (Photo by Tyrone Siu/Reuters)