File photo taken on Jan. 27, 2016 shows giant panda Ximei training her cub to climb tree during a wild training in Hetaoping Wild Training Base, southwest China's Sichuan Province. With the increasing number of giant pandas bred and kept in captivity, China started sending captive-bred pandas into the wild in 2006 in an effort to improve the genetic diversity and quality of the species. (Photo/Xinhua)
