Photo taken on Aug. 7, 2015 shows a pair of newly-born panda twins at Chengdu Research Base of Giant Panda Breeding in Chengdu, capital of southwest China's Sichuan Province. Panda mother Nini gave birth to female twins in the evening of Aug. 7, with the elder sister weighing at 145.6 grams and the younger one at 204.1 grams. The Chengdu Research Base of Giant Panda Breeding has witnessed six panda parturitions until Aug. 7 this year, of which five parturitions gave birth to twins. (Photo: Xinhua/Xue Yubin)
