Moscow Zoo celebrates birthdays for two giant pandas Ding Ding and Ru Yi, Wednesday. /VCG Photo

Zoo staff celebrate the pair's birthday with fruit cakes and piles of bamboo leaves. /VCG Photo

Ru Yi, a three-year-old male panda and Ding Ding, a two-year-old female panda, arrived to Moscow in April. /VCG Photo

The pandas are expected to remain in their new home during a 15-year collaborative research project between China and Russia. /VCG Photo