The world's only surviving panda triplets celebrated their sixth birthday in Guangzhou City of south China's Guangdong Province on July 29, 2020. (Photo: China News Service/ Chen Jimin)

The world's only surviving panda triplets celebrated their sixth birthday in Guangzhou City of south China's Guangdong Province on July 29, 2020. (Photo: China News Service/ Chen Jimin)

The world's only surviving panda triplets celebrated their sixth birthday in Guangzhou City of south China's Guangdong Province on July 29, 2020. (Photo: China News Service/ Chen Jimin)

The world's only surviving panda triplets celebrated their sixth birthday in Guangzhou City of south China's Guangdong Province on July 29, 2020. (Photo: China News Service/ Chen Jimin)

The world's only surviving panda triplets celebrated their sixth birthday in Guangzhou City of south China's Guangdong Province on July 29, 2020. (Photo: China News Service/ Chen Jimin)