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

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

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

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

Giant panda Yuan Man is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020.

Giant panda Shuang Xin is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020.

Giant panda Yuan Man is seen at the panda house in Xining, northwest China's Qinghai Province, Aug. 16, 2020.