Giant panda Meng Meng waits to be fed at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Jia Jia takes a rest at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Meng Meng plays on a tree at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Jia Jia enjoys snow fun at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Meng Meng sits up on a tree at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Meng Meng takes a walk at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Jia Jia takes a rest at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Jia Jia enjoys bamboo shoots at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Meng Meng tries to climb up a tree at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang)

Giant panda Meng Meng enjoys snow fun at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 10

Giant panda Jia Jia enjoys bamboo shoots at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 11

Giant panda Meng Meng stays with its feeder at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 12

Giant panda Meng Meng enjoys bamboo shoots at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 13

Giant panda Meng Meng plays on a tree at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 14

Giant panda Jia Jia takes a rest at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 15

Giant panda Meng Meng waits to get outside at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 16

A tourist takes photos of a giant panda at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 17

Giant panda Meng Meng and Jia Jia are seen at a Siberian tiger breeding base in Changchun, northeast China's Jilin Province, Dec. 9, 2015. Two giant pandas Jia Jia and Meng Meng settled into the breeding base in June 2015 and will stay for three years for both public viewing and scientific research, where there is the farthest north a panda has resided for a long period in China, a region usually avoided due to its cold winters, with the species preferring warmer habitats in southwest China's Sichuan Province. (Xinhua/Xu Chang) 18