Staff members carry giant pandas Chu Xin and Mu Yun with cages for quarantine in Changchun, capital of northeast China's Jilin Province, Aug. 21, 2018. Chu Xin and Mu Yun, two 2-year-old female giant pandas, on Tuesday left the Dujiangyan base of China Conservation and Research Center for Giant Panda in Sichuan and arrived at the panda enclosure of the Siberian Tiger Park in Changchun. The pandas will meet the public on Aug. 24. (Xinhua/Lin Hong)

Giant panda Chu Xin waits for health check in Changchun, capital of northeast China's Jilin Province, Aug. 21, 2018. Chu Xin and Mu Yun, two 2-year-old female giant pandas, on Tuesday left the Dujiangyan base of China Conservation and Research Center for Giant Panda in Sichuan and arrived at the panda enclosure of the Siberian Tiger Park in Changchun. The pandas will meet the public on Aug. 24. (Xinhua/Lin Hong)

Photo taken on Aug. 21, 2018 shows giant panda Chu Xin in Changchun, capital of northeast China's Jilin Province. Chu Xin and Mu Yun, two 2-year-old female giant pandas, on Tuesday left the Dujiangyan base of China Conservation and Research Center for Giant Panda in Sichuan and arrived at the panda enclosure of the Siberian Tiger Park in Changchun. The pandas will meet the public on Aug. 24. (Xinhua/Lin Hong)

Giant panda Mu Yun waits for health check in Changchun, capital of northeast China's Jilin Province, Aug. 21, 2018. Chu Xin and Mu Yun, two 2-year-old female giant pandas, on Tuesday left the Dujiangyan base of China Conservation and Research Center for Giant Panda in Sichuan and arrived at the panda enclosure of the Siberian Tiger Park in Changchun. The pandas will meet the public on Aug. 24. (Xinhua/Lin Hong)

Journalists take photos of giant pandas Chu Xin and Mu Yun in Changchun, capital of northeast China's Jilin Province, Aug. 21, 2018. Chu Xin and Mu Yun, two 2-year-old female giant pandas, on Tuesday left the Dujiangyan base of China Conservation and Research Center for Giant Panda in Sichuan and arrived at the panda enclosure of the Siberian Tiger Park in Changchun. The pandas will meet the public on Aug. 24. (Xinhua/Lin Hong)