Ding Ding, the female panda born in 2017, is seen in a transport cage before leaving for Moscow 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)