Giant panda cubs greet visitors ahead of the upcoming National Day holiday at the Chengdu Research Base of Giant Panda Breeding in Southwest China's Sichuan province on Sept 29, 2020. (HE HAIYANG / FOR CHINADAILY.COM.CN)

A breeder plays with a giant panda cub at the Chengdu Research Base of Giant Panda Breeding in Southwest China's Sichuan province on Sept 29, 2020. (HE HAIYANG / FOR CHINADAILY.COM.CN)

A giant panda cub hugs the breeder at the Chengdu Research Base of Giant Panda Breeding in Southwest China's Sichuan province on Sept 29, 2020. (HE HAIYANG / FOR CHINADAILY.COM.CN)

A breeder interacts with giant panda cubs at the Chengdu Research Base of Giant Panda Breeding in Southwest China's Sichuan province on Sept 29, 2020. (HE HAIYANG / FOR CHINADAILY.COM.CN)

Giant panda cubs playing at the Chengdu Research Base of Giant Panda Breeding in Southwest China's Sichuan province on Sept 29, 2020. (HE HAIYANG / FOR CHINADAILY.COM.CN)

Giant panda cubs born this year meet the public play at the Chengdu Research Base of Giant Panda Breeding in Southwest China's Sichuan province on Sept 29, 2020. (HE HAIYANG / FOR CHINADAILY.COM.CN)