(220808) -- CHONGQING, Aug. 8, 2022 (Xinhua) -- A staff member observes giant panda Er Shun through a monitoring camera at Chongqing Zoo in southwest China's Chongqing Municipality, Aug. 8, 2022. Giant panda Er Shun, born in 2007, returned to China in November of 2020 after staying in the Toronto Zoo and the Calgary Zoo in Canada since March of 2013. Er Shun gave birth to a pair of twin brothers on July 22, 2022 at the Chongqing Zoo after she had succeeded in natural mating with male panda Qing Qing in the China Conservation and Research Center for the Giant Panda in March this year. The panda twin brothers made their debut at the zoo Monday. (Xinhua/Tang Yi)