Female giant panda Man Yuan walks to a customized birthday cake and gifts at Xining Panda House in northwest China's Qinghai Province on June 27, 2021. Staff customized cakes and decorated the house for giant panda Man Yuan and her sister Qi Guo as a celebration of their fifth birthday. (Photo/ China News Service: Ma Mingyan)

Panda Qi Guo eats bamboo on her 5-year-old birthday at Xining Panda House in China's Qinghai Province on June 27, 2021. (Photo/ China News Service: Ma Mingyan)

Panda Qi Guo plays at Xining Panda House in China's Qinghai Province on June 27, 2021. (Photo/ China News Service: Ma Mingyan)

Female panda Ji Lan eats bamboo shoots at Nanning Zoo in Guangxi Guangxi Zhuang Autonomous Region on June 27, 2021. (Photo/ Yu Jing)

Panda Ji Lan eats bamboo shoots at Nanning Zoo in Guangxi Guangxi Zhuang Autonomous Region on June 27, 2021. (Photo/ Yu Jing)

Some flowers arouse Ji Lan's attentions. (Photo/ Yu Jing)

Ji Mei hangs out at Nanning Zoo in Guangxi Guangxi Zhuang Autonomous Region on June 27, 2021. (Photo/ Yu Jing)