Giant panda "Damei" eats at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Damei" eats at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Damei" eats at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Damei" eats at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Qingqing" frolics at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Qingqing" frolics at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut in Changsha on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Qingqing" frolics at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut in Changsha on Saturday. (Xinhua/Chen Zhenhai)

Giant panda "Qingqing" frolics at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Oct. 10, 2020. Giant pandas "Damei" and "Qingqing" from Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province made their debut on Saturday. (Xinhua/Chen Zhenhai)