Giant panda Jia Jia eats bamboo next to her birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as she celebrates her 37-year-old birthday. Jia Jia broke the Guinness World Records title for “Oldest Panda Living in Captivity” on Tuesday. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia walks eats bamboo next to her birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as she celebrates her 37-year-old birthday. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia eats bamboo next to her birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as she celebrates her 37-year-old birthday. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia tastes her birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as she celebrates her 37-year-old birthday. (Photo by Kin Cheung/AP Photo)

Tourists walk past giant panda avenue at Ocean Park in Hong Kong, Tuesday, July 28, 2015. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia eats bamboo next to her birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as she celebrates her 37-year-old birthday. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia enjoys her birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as she celebrates her 37-year-old birthday. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia looks on beside a birthday cake made from ice and vegetables as she celebrates her 37-year-old birthday at the Hong Kong Ocean Park, China, July 28, 2015. Jia Jia, the oldest giant panda living in captivity, set a Guinness World Records title for “Oldest Panda Living in Captivity” on Tuesday, with her age said to put her on par with a human centenarian. (Photo by Bobby Yip/Reuters)

Visitors look at panda souvenirs at the shop at Ocean Park in Hong Kong, Tuesday, July 28, 2015. (Photo by Kin Cheung/AP Photo)

Giant panda Jia Jia looks at a birthday cake made from ice and vegetables prepared for her by Ocean Park staff during her 37-year-old birthday at the Hong Kong Ocean Park, China, July 28, 2015. (Photo by Bobby Yip/Reuters)

Giant panda Jia Jia walks on her 37-year-old birthday at the Hong Kong Ocean Park, China, July 28, 2015. (Photo by Bobby Yip/Reuters)

A visitor poses for a photo as she wears panda souvenirs at the shop at Ocean Park in Hong Kong, Tuesday, July 28, 2015. (Photo by Kin Cheung/AP Photo)

Chinese Giant panda An An eats bamboo next to his birthday cake made with ice and vegetables at Ocean Park in Hong Kong, Tuesday, July 28, 2015 as he celebrates his 29th birthday. (Photo by Kin Cheung/AP Photo)