Giant panda Xue Xue is released into the wild at the Liziping Natural Reserve in Shimian, Southwest China's Sichuan Province, Oct. 14, 2014. After two years' training in habitat selection, foraging, and avoiding natural enemies, the two-year-old female is believed to be able to survive in the Liziping Natural Reserve. Xue Xue is the fourth panda released into the wild after Xiang Xiang, Tao Tao and Zhang Xiang. (Xinhua/Xue Yubin)

Giant panda Xue Xue is released into the wild at the Liziping Natural Reserve in Shimian, Southwest China's Sichuan Province, Oct. 14, 2014. After two years' training in habitat selection, foraging, and avoiding natural enemies, the two-year-old female is believed to be able to survive in the Liziping Natural Reserve. Xue Xue is the fourth panda released into the wild after Xiang Xiang, Tao Tao and Zhang Xiang. (Xinhua/Xue Yubin)

Giant panda Xue Xue is released into the wild at the Liziping Natural Reserve in Shimian, Southwest China's Sichuan Province, Oct. 14, 2014. After two years' training in habitat selection, foraging, and avoiding natural enemies, the two-year-old female is believed to be able to survive in the Liziping Natural Reserve. Xue Xue is the fourth panda released into the wild after Xiang Xiang, Tao Tao and Zhang Xiang. (Xinhua/Xue Yubin)

Giant panda Xue Xue is released into the wild at the Liziping Natural Reserve in Shimian, Southwest China's Sichuan Province, Oct. 14, 2014. After two years' training in habitat selection, foraging, and avoiding natural enemies, the two-year-old female is believed to be able to survive in the Liziping Natural Reserve. Xue Xue is the fourth panda released into the wild after Xiang Xiang, Tao Tao and Zhang Xiang. (Xinhua/Xue Yubin)

Giant panda Xue Xue is released into the wild at the Liziping Natural Reserve in Shimian, Southwest China's Sichuan Province, Oct. 14, 2014. After two years' training in habitat selection, foraging, and avoiding natural enemies, the two-year-old female is believed to be able to survive in the Liziping Natural Reserve. Xue Xue is the fourth panda released into the wild after Xiang Xiang, Tao Tao and Zhang Xiang. (Xinhua/Xue Yubin)

Giant panda Xue Xue is released into the wild at the Liziping Natural Reserve in Shimian, Southwest China's Sichuan Province, Oct. 14, 2014. After two years' training in habitat selection, foraging, and avoiding natural enemies, the two-year-old female is believed to be able to survive in the Liziping Natural Reserve. Xue Xue is the fourth panda released into the wild after Xiang Xiang, Tao Tao and Zhang Xiang. (Xinhua/Xue Yubin)