File photo of one of two giant pandas settle down in the new home in Jilin Province in 2015. Jiajia and Mengmeng were the first giant pandas to live in a high-altitude habitat in China after they were moved from Sichuan to the Jilin Wild Life Rescue and Breeding Center in Changchun in 2015. Over the past three years, the two pandas have adapted to the new environment. They have now been transported to Dujiangyan base in Sichuan Province for a breeding project next year. (Photos: China News Service/Zhang Yao) 

File photo of one of two giant pandas given new homes in Jilin Province in 2015. (Photo: China News Service/Zhang Yao) 

File photo of one of two giant pandas given new homes in Jilin Province in 2015.

File photo of one of two giant pandas given new homes in Jilin Province in 2018. (Photo: China News Service/Zhang Yao) 

One of two giant pandas given new homes in Jilin Province is transported to Changchun Airport in Jilin Province, Aug. 20, 2018. Jiajia and Mengmeng were the first giant pandas to live in a high-altitude habitat in China after they were moved from Sichuan to the Jilin Wild Life Rescue and Breeding Center in Changchun in 2015. Over the past three years, the two pandas have adapted to the new environment in Changchun. They have now been transported to Dujiangyan base in Sichuan province for a breeding project next year. (Photo: China News Service/Zhang Yao) 

One of two giant pandas given new homes in Jilin Province is transported to Changchun Airport in Jilin Province, Aug. 20, 2018. Jiajia and Mengmeng were the first giant pandas to live in a high-altitude habitat in China after they were moved from Sichuan to the Jilin Wild Life Rescue and Breeding Center in Changchun in 2015. Over the past three years, the two pandas have adapted to the new environment in Changchun. They have now been transported to Dujiangyan base in Sichuan province for a breeding project next year. (Photo: China News Service/Zhang Yao)

One of two giant pandas given new homes in Jilin Province is transported to Changchun Airport in Jilin Province, Aug. 20, 2018. Jiajia and Mengmeng were the first giant pandas to live in a high-altitude habitat in China after they were moved from Sichuan to the Jilin Wild Life Rescue and Breeding Center in Changchun in 2015. Over the past three years, the two pandas have adapted to the new environment in Changchun. They have now been transported to Dujiangyan base in Sichuan province for a breeding project next year. (Photo: China News Service/Zhang Yao) 

One of two giant pandas given new homes in Jilin Province is transported to Changchun Airport in Jilin Province, Aug. 20, 2018. Jiajia and Mengmeng were the first giant pandas to live in a high-altitude habitat in China after they were moved from Sichuan to the Jilin Wild Life Rescue and Breeding Center in Changchun in 2015. Over the past three years, the two pandas have adapted to the new environment in Changchun. They have now been transported to Dujiangyan base in Sichuan province for a breeding project next year. (Photo: China News Service/Zhang Yao) 

Fans wave goodbye to two giant pandas being transported to Changchun Airport in Jilin Province, Aug. 20, 2018. Jiajia and Mengmeng were the first giant pandas to live in a high-altitude habitat in China after they were moved from Sichuan to the Jilin Wild Life Rescue and Breeding Center in Changchun in 2015. Over the past three years, the two pandas have adapted to the new environment in Changchun. They have now been transported to Dujiangyan base in Sichuan province for a breeding project next year. (Photo: China News Service/Zhang Yao)