MACAO, Nov. 20 (Xinhua) --A pair of giant pandas Kaikai and Xinxin were chosen from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province as a gift of the central government to Macao Special Administrative Region in 2015. They gave birth to twin brothers Jianjian and Kangkang here in 2016. The panda family is now living a happy and leisured life.