Two-year-old giant panda twins Jia Panpan and Jia Yueyue play together during their 2nd birthday celebration at the Toronto Zoo in Toronto, Canada, Oct. 13, 2017. The Toronto Zoo hosted the 2nd birthday celebration for the first Canadian-born giant panda twins Jia Panpan (meaning Canadian Hope) and Jia Yueyue (meaning Canadian Joy) on Friday. The female giant panda Er Shun from China gave birth to the twins in Toronto Zoo on Oct. 13, 2015. (Xinhua/Zou Zheng)