Giant panda "Yuan Zai" enjoys a birthday cake at the Taipei Zoo in Taipei, southeast China's Taiwan, July 6, 2017. The zoo on Thursday celebrated the fourth birthday of "Yuan Zai". (Xinhua/Zhou Mi)
Giant panda "Yuan Zai" enjoys a birthday cake at the Taipei Zoo in Taipei, southeast China's Taiwan, July 6, 2017. The zoo on Thursday celebrated the fourth birthday of "Yuan Zai". (Xinhua/Zhou Mi)
A visitor takes photos of giant panda "Yuan Zai" at the Taipei Zoo in Taipei, southeast China's Taiwan, July 6, 2017. The zoo on Thursday celebrated the fourth birthday of "Yuan Zai". (Xinhua/Zhou Mi)
Giant panda "Yuan Zai" is seen at the Taipei Zoo in Taipei, southeast China's Taiwan, July 6, 2017. The zoo on Thursday celebrated the fourth birthday of "Yuan Zai". (Xinhua/Zhou Mi)
Giant panda "Yuan Zai" enjoys a birthday cake at the Taipei Zoo in Taipei, southeast China's Taiwan, July 6, 2017. The zoo on Thursday celebrated the fourth birthday of "Yuan Zai". (Xinhua/Zhou Mi)
