A giant panda eats a pumpkin in the panda house in the Qinghai-Tibet Plateau Wild Zoo in Xining, capital of Northwest China's Qinghai Province, June 16, 2019. The panda house in the Qinghai-Tibet Plateau Wild Zoo, where four pandas from the Chengdu Research Base of Giant Panda Breeding live, opened to the public here on Sunday. The four pandas settled down in the plateau city earlier this month. Qinghai Province will launch a series of education activities about giant pandas in the following three years. (Photo: Xinhua)

Two giant pandas are seen in the panda house in the Qinghai-Tibet Plateau Wild Zoo in Xining, capital of Northwest China's Qinghai Province, June 16, 2019. The panda house in the Qinghai-Tibet Plateau Wild Zoo, where four pandas from the Chengdu Research Base of Giant Panda Breeding live, opened to the public here on Sunday. The four pandas settled down in the plateau city earlier this month. Qinghai Province will launch a series of education activities about giant pandas in the following three years. (Photo: Xinhua)

A giant panda eats carrots in the panda house in the Qinghai-Tibet Plateau Wild Zoo in Xining, capital of Northwest China's Qinghai Province, June 16, 2019. The panda house in the Qinghai-Tibet Plateau Wild Zoo, where four pandas from the Chengdu Research Base of Giant Panda Breeding live, opened to the public here on Sunday. The four pandas settled down in the plateau city earlier this month. Qinghai Province will launch a series of education activities about giant pandas in the following three years. (Photo: Xinhua)

A giant panda is seen in the panda house in the Qinghai-Tibet Plateau Wild Zoo in Xining, capital of Northwest China's Qinghai Province, June 16, 2019. The panda house in the Qinghai-Tibet Plateau Wild Zoo, where four pandas from the Chengdu Research Base of Giant Panda Breeding live, opened to the public here on Sunday. The four pandas settled down in the plateau city earlier this month. Qinghai Province will launch a series of education activities about giant pandas in the following three years. (Photo: Xinhua)

A giant panda is seen in the panda house in the Qinghai-Tibet Plateau Wild Zoo in Xining, capital of Northwest China's Qinghai Province, June 16, 2019. The panda house in the Qinghai-Tibet Plateau Wild Zoo, where four pandas from the Chengdu Research Base of Giant Panda Breeding live, opened to the public here on Sunday. The four pandas settled down in the plateau city earlier this month. Qinghai Province will launch a series of education activities about giant pandas in the following three years. (Photo: Xinhua)

A giant panda is seen in the panda house in the Qinghai-Tibet Plateau Wild Zoo in Xining, capital of Northwest China's Qinghai Province, June 16, 2019. The panda house in the Qinghai-Tibet Plateau Wild Zoo, where four pandas from the Chengdu Research Base of Giant Panda Breeding live, opened to the public here on Sunday. The four pandas settled down in the plateau city earlier this month. Qinghai Province will launch a series of education activities about giant pandas in the following three years. (Photo: Xinhua)