A cute 100-day-old panda is weighed at Chongqing Zoo, in Chongqing, Southwest China, Dec 13, 2011. The cub, weighing 5.8 kilograms, was born in September and will join its parents, five other pandas as well as 200 other species of animals at the public attraction in the west of the city. An ultra sound examination will carried out to determine the cub's gender as it is too early to tell. The zoo is also inviting people to suggest a name for the cub on QQ Weibo. Some suggestions so far include Mengmeng, Hanhan and Qiuqiu. [Photo/CFP]

Hu Youlin, a keeper at the zoo weighs the panda cub as onlookers snap pictures, Dec 13, 2011. [Photo/CFP]

A 100-day-old panda cub is held by a keeper at Chongqing Zoo, Dec 13, 2011. [Photo/CFP]

A 100-day-old panda is weighed in a basket at Chongqing Zoo, Dec 13, 2011.

A 100-day-old panda is weighed in a basket at Chongqing Zoo, Dec 13, 2011. [Photo/CFP]

A cute 100-day-old panda is weighed at Chongqing Zoo, in Chongqing, Southwest China, Dec 13, 2011. The cub, weighing 5.8 kilograms, was born in September and will join its parents, five other pandas as well as 200 other species of animals at the public attraction in the west of the city. An ultra sound examination will carried out to determine the cub's gender as it is too early to tell. The zoo is also inviting people to suggest a name for the cub on QQ Weibo. Some suggestions so far include Mengmeng, Hanhan and Qiuqiu.