In this Monday September 23, 2013 photo, staff members arrange panda cubs in a crib for photos at the Giant Panda Breeding and Research Base in Chengdu, in southwest China's Sichuan province. Fourteen panda cubs were shown to the public at the base on Monday. (Photo by AP Photo)

In this Monday, September 23, 2013 photo, panda cubs rest in a crib at the Giant Panda Breeding and Research Base in Chengdu, in southwest China's Sichuan province. (Photo by AP Photo)

A breeder puts a giant panda cub into a crib at Chengdu Research Base of Giant Panda Breeding in Chengdu, Sichuan province, September 23, 2013. Fourteen new joiners to the 128-giant-panda-family at the base were shown to the public on Monday, according to local media. (Photo by Reuters/China Daily)

Giant panda cubs lie in a crib at Chengdu Research Base of Giant Panda Breeding in Chengdu, Sichuan province, September 23, 2013. (Photo by Reuters/China Daily)

Breeders take care of giant panda cubs inside a crib at Chengdu Research Base of Giant Panda Breeding in Chengdu, Sichuan province, September 23, 2013. (Photo by Reuters/China Daily)

Giant panda cubs lie in a crib at Chengdu Research Base of Giant Panda Breeding in Chengdu, Sichuan province, September 23, 2013. (Photo by Reuters/China Daily)