Participants run on the Nanpu bridge as they compete at the Shanghai international Marathon in Shanghai Dec 4, 2011. [Photo/Agencies]

Tian Tian, a female giant panda looks out of her container as it is unloaded off an aircraft at Edinburgh airport in Scotland Dec 4, 2011. A pair of giant pandas arrived in Scotland on Sunday to a reception of cheering and flag-waving crowds, the bears loaned by China in a move lauded by British officials as strengthening ties between the two countries. [Photo/Agencies]