"I've been coming to Yuan Yuan's birthday celebrations since her first one in Taipei. Watching her grow up and then have her own cubs is really touching," said Gao, wearing a panda headband and holding a homemade birthday poster featuring a family portrait of Yuan Yuan and her family of four.

A fan club for the pandas, with more than 1,000 members across the island, prepared tea bags and T-shirts on the theme of Yuan Yuan's birthday as souvenirs.

On the celebration billboard in the panda pavilion, fans left heartfelt birthday cards for Yuan Yuan, wishing her "always be happy," "stay healthy forever," and "have a long life." The birthday party was also livestreamed online, with thousands of viewers sending their likes and blessings.