Thursday was a big day for panda cub Yuan Zai, as it celebrated its fourth birthday in Taipei Zoo. /VCG Photo

The cute panda’s birthday cake was made of ice and fruits, allowing the bear to enjoy its birthday treat without worrying much about an expanding waistline. /VCG Photo

Yuan Zai is the offspring of Tuan Tuan and Yuan Yuan, a pair that arrived in Taipei in 2008, as a gift to the island region Taiwan from the Chinese mainland. / VCG Photo

Together, the names Tuan and Yuan mean "family reunion". / VCG Photo