Two three-year-old giant pandas, male Er Xi and female Ya Yun, were transferred from the Chengdu Research Base of Giant Panda Breeding to the Changsha Ecological Zoo in Hunan Province on June 17, 2013. They join females Bei Bei, Qi Fu, and Ni Ni who live in Changsha since 2010 and 2011.
Source: http://news.hexun.com/2013-06-17/155211987.html
Source: http://news.163.com/13/0618/16/91LPQ80F00014JB5.html