Photo taken on Sept. 29, 2020 shows a giant panda cub who makes debut at Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province. Some giant panda cubs made their debut on Tuesday. (Photo by Zhang Kefan/Xinhua)

Photo taken on Sept. 29, 2020 shows giant panda cubs who make debut at Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province. Some giant panda cubs made their debut on Tuesday. (Photo by Zhang Kefan/Xinhua)

Photo taken on Sept. 29, 2020 shows giant panda cubs who make debut at Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province. Some giant panda cubs made their debut on Tuesday. (Photo by Zhang Kefan/Xinhua)

Photo taken on Sept. 29, 2020 shows giant panda cubs who make debut at Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province. Some giant panda cubs made their debut on Tuesday. (Photo by Chen Juwei/Xinhua)

Photo taken on Sept. 29, 2020 shows giant panda cubs who make debut at Chengdu Research Base of Giant Panda Breeding in southwest China's Sichuan Province. Some giant panda cubs made their debut on Tuesday. (Photo by Zhang Kefan/Xinhua)