Giant panda cub nicknamed "Yuan Zai" stays with its mother "Yuan Yuan" at the Taipei Zoo in Taipei, southeast China's Taiwan, Sept. 11, 2013. The female cub, born on July 6, weighs about 4.2 kilograms. It is the first baby of giant pandas "Tuan Tuan" and "Yuan Yuan", which were presented as goodwill gifts to Taiwan by the Chinese mainland. (Xinhua/Taipei Zoo)