Ding Ding, the female panda born in 2017, is seen in a transport cage at the Bifengxia base of the China Conservation and Research Center for the Giant Panda in Ya'an, southwest China's Sichuan Province, April 29, 2019. Chinese researchers held a send-off ceremony for a pair of giant pandas who are to depart for Moscow on Monday for a 15-year collaborative research. Ru Yi, the male panda born in 2016, and Ding Ding, the female panda born in 2017, are scheduled to board a flight at 1:45 p.m. in Chengdu and arrive in Moscow at 10:00 p.m. Beijing Time the same day, the panda research base in southwest China's Sichuan Province said. (Xinhua/Xue Yubin)