Keepers feed pandas with an apple hanging from a long pole at Chengdu Base of Giant Panda Breeding in Southwest China`s Sichuan province, Oct 23, 2011. [Photo/CFP]

Keepers feed pandas with an apple hanging from a long pole at Chengdu Base of Giant Panda Breeding in Southwest China`s Sichuan province, Oct 23, 2011. [Photo/CFP]

Keepers feed pandas with an apple hanging from a long pole at Chengdu Base of Giant Panda Breeding in Southwest China`s Sichuan province, Oct 23, 2011. The keepers invented the feeding pole in order to encourage the giant pandas to exercise and remain energetic using food rewards. [Photo/CFP]