Giant panda Qin Kuer plays at the Qinling giant panda research center in northwest China’s Shaanxi province on May 9, 2020. (Xinhua/Zhang Bowen)

Giant panda Zhu Zhu takes care of her cub at the Qinling giant panda research center in northwest China’s Shaanxi province on Dec. 4, 2019. (Xinhua/Zhang Bowen)

Three giant panda cubs Jia Jia, Yuan Yuan and Qin Kuer (L to R) play at the Qinling giant panda research center in northwest China’s Shaanxi province on Dec. 3, 2019. (Xinhua/Zhang Bowen)

A member of staff interacts with giant pandas at the Qinling giant panda research center in northwest China’s Shaanxi province on May 10, 2020. (Xinhua/Zhang Bowen)

Qi Zai, a rare brown and white giant panda, plays at the Qinling giant panda research center in northwest China’s Shaanxi province on May 9, 2020. (Xinhua/Zhang Bowen)

This photo taken on May 10, 2020 shows giant pandas at the Qinling giant panda research center in northwest China’s Shaanxi province. (Xinhua/Zhang Bowen)

An aerial photo taken on May 9, 2020 shows the Qinling giant panda research center in northwest China’s Shaanxi province. (Xinhua/Zhang Bowen)