A keeper feeds a panda cub with milk from a bottle at Chengdu Research Base of Giant Panda Breeding in Chengdu, Southwest China`s Sichuan province, Oct 25, 2011. The base conducted physical examinations on its youngest pandas on Tuesday. A total of 12 panda cubs were born this year, and the base is now home to 108 pandas. [Photo/Asianewsphoto]

The weight of a panda cub is measured during a health checkup at Chengdu Research Base of Giant Panda Breeding in Chengdu, Oct 25, 2011. [Photo/Asianewsphoto]

A mother panda cleans her cub at Chengdu Research Base of Giant Panda Breeding in Chengdu, Oct 25, 2011. [Photo/Asianewsphoto]

A panda cub at Chengdu Research Base of Giant Panda Breeding in Chengdu, Oct 25, 2011. A mother panda and her cub at Chengdu Research Base of Giant Panda Breeding in Chengdu, Oct 25, 2011. [Photo/Asianewsphoto]