Giant panda Qi Guo is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Geng Huihuang)

Giant pandas Qi Guo (R) and Yuan Man are seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Geng Huihuang)

Giant pandas Qi Guo (L) and Yuan Man are seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Xue Yubin)

Giant pandas Qi Guo (L) and Yuan Man are seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Xue Yubin)

Giant panda Yuan Man is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Xue Yubin)

Giant panda Shuang Xin is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Xue Yubin)

Giant panda Yuan Man is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020. (Xinhua/Geng Huihuang)