Giant panda cub nicknamed "Yuan Zai" is weighed at the Taipei Zoo in Taipei, southeast China's Taiwan, Sept. 10, 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, who were given as a goodwill gift to Taiwan by the Chinese mainland. [Photo/Xinhua]?