FILE- Panda cub Bao Bao, right, and her mother Mei Xiang are seen in their habitat at the National Zoo in Washington, Aug. 23, 2014. (AP Photo/Pablo Martinez Monsivais, File)

In this image taken from video and released by China's National Forestry and Grassland Administration, male giant panda Bao Li is prepared for transport from the Dujiangyan Base of the China Conservation and Research Center for the Giant Panda in southwestern China's Sichuan province on Monday, Oct. 14, 2024. (Jin Tao/China's National Forestry and Grassland Administration via AP)

In this image taken from video and released by China's National Forestry and Grassland Administration, a cage containing female giant panda Qing Bao is loaded onto a plane at the Chengdu Shuangliu International Airport in southwestern China's Sichuan province on Monday, Oct. 14, 2024. (Jin Tao/China's National Forestry and Grassland Administration via AP)

In this image taken from video and released by China's National Forestry and Grassland Administration, workers send off the pair of giant pandas Bao Li and Qing Bao from the Dujiangyan Base of the China Conservation and Research Center for the Giant Panda in southwestern China's Sichuan province on Monday, Oct. 14, 2024. (Jin Tao/China's National Forestry and Grassland Administration via AP)

A FedEx cargo plane arrives at Dulles International Airport carrying giant pandas from China on Tuesday, Oct. 15, 2024 in Sterling, Va. (AP Photo/Kevin Wolf)

A FedEx cargo plane arrives at Dulles International Airport carrying giant pandas from China on Tuesday, Oct. 15, 2024 in Sterling, Va. (AP Photo/Kevin Wolf)

In this image taken from video and released by China's National Forestry and Grassland Administration, a cage containing male giant panda Bao Li is loaded onto a plane at the Chengdu Shuangliu International Airport in southwestern China's Sichuan province on Monday, Oct. 14, 2024. (Jin Tao/China's National Forestry and Grassland Administration via AP)

Police vehicles escort a FedEx truck carrying giant pandas to the National Zoo after they arrived at Dulles International Airport from China on Tuesday, Oct. 15, 2024 in Sterling, Va. (AP Photo/Kevin Wolf)

Ground crew walk up to a FedEx cargo plane carrying giant pandas from China after it landed at Dulles International Airport on Tuesday, Oct. 15, 2024 in Sterling, Va. (AP Photo/Kevin Wolf)

In this image taken from video and released by China's National Forestry and Grassland Administration, a pair of giant pandas Bao Li and Qing Bao are prepared for loading onto a plane at the Chengdu Shuangliu International Airport in southwestern China's Sichuan province on Monday, Oct. 14, 2024. (Jin Tao/China's National Forestry and Grassland Administration via AP)

In this image taken from video and released by China's National Forestry and Grassland Administration, female giant panda Qing Bao is prepared for transport from the Dujiangyan Base of the China Conservation and Research Center for the Giant Panda in southwestern China's Sichuan province on Monday, Oct. 14, 2024. (Jin Tao/China's National Forestry and Grassland Administration via AP)

FILE - Giant pandas eat bamboo at the Smithsonian's National Zoo, May 4, 2022, in Washington. (AP Photo/Jacquelyn Martin, File)

A FedEx cargo plane arrives at Dulles International Airport carrying giant pandas from China on Tuesday, Oct. 15, 2024 in Sterling, Va. (AP Photo/Kevin Wolf)