It’s party time today (Wednesday) for the world’s only living panda triplets. Mengmeng, Shuaishuai and Kuku are celebrating their first birthday at the Guangzhou Chimelong Safari Park with a special cake. 

More than 4,000 people have come from across China to join the triplets’ birthday celebration. “I wish them a happy birthday and have healthy and fast growth,” said Li Yu, a visitor.

The panda triplets, named Meng Meng, Shuai Shuai and Ku Ku, were born within four hours of one another on July 29, 2014, in Guangzhou City, capital of Guangdong. They are the longest surviving panda triplets in history.

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They are the fourth group of triplets known to have been born in the past four decades. In 1967, when the first triplet were born, none survived. In 1999 and 2003, among the second and third group of panda triplet, only one survived from each group.

Panda fans have seen big changes in the triplets since their births. Each panda now weighs more than 30 kilograms and has a height of about one meter.

Zoo keepers say now they are keeping a close eye on them to avoid any hurt as they are becoming more active and naughty.

“They like to climb high and jump from time to time, but they are still not agile enough,” said Dong Guixin, general manager of the Guangzhou Chimelong Safari Park.

More than three million people have come to the park to see Mengmeng, Shuaishuai and Kuku since they made their public debut.