Giant pandas are seen in the panda house of the Siberian Tiger Park of Jilin Province in Changchun City, capital of northeast China's Jilin Province, July 1, 2015. A pair of giant pandas from the China Conservation and Research Center for the Giant Panda saw public in the Siberian Tiger Park of Jilin Province on Wednesday. The pandas, one male and one female, eight years old and seven years old respectively, will be raised here for three years. Photo: Xinhua

A giant panda eats bamboo in the panda house of the Siberian Tiger Park of Jilin Province in Changchun City, capital of northeast China's Jilin Province, July 1, 2015. A pair of giant pandas from the China Conservation and Research Center for the Giant Panda saw public in the Siberian Tiger Park of Jilin Province on Wednesday. The pandas, one male and one female, eight years old and seven years old respectively, will be raised here for three years. Photo: Xinhua 

A giant panda walks in the panda house of the Siberian Tiger Park of Jilin Province in Changchun City, capital of northeast China's Jilin Province, July 1, 2015. A pair of giant pandas from the China Conservation and Research Center for the Giant Panda saw public in the Siberian Tiger Park of Jilin Province on Wednesday. The pandas, one male and one female, eight years old and seven years old respectively, will be raised here for three years. Photo: Xinhua 

A giant panda eats bamboo in the panda house of the Siberian Tiger Park of Jilin Province in Changchun City, capital of northeast China's Jilin Province, July 1, 2015. A pair of giant pandas from the China Conservation and Research Center for the Giant Panda saw public in the Siberian Tiger Park of Jilin Province on Wednesday. The pandas, one male and one female, eight years old and seven years old respectively, will be raised here for three years. Photo: Xinhua 

A giant panda walks in the panda house of the Siberian Tiger Park of Jilin Province in Changchun City, capital of northeast China's Jilin Province, July 1, 2015. A pair of giant pandas from the China Conservation and Research Center for the Giant Panda saw public in the Siberian Tiger Park of Jilin Province on Wednesday. The pandas, one male and one female, eight years old and seven years old respectively, will be raised here for three years. Photo: Xinhua