Visitors come to the Moscow Zoo on March 19, 2023 in Moscow, Russia, to take a look at two giant pandas, Ding Ding and Ru Yi, who arrived in Moscow in 2019 from China's Sichuan Province for a 15-year joint research program. (Photo: Weng Qiyu)

Visitors look at giant panda Ding Ding at the Moscow Zoo in Moscow, Russia, March 19, 2023. (Photo: Weng Qiyu)

Photo taken on March 19, 2023 shows the giant panda Ding Ding at the Moscow Zoo in Moscow, Russia. (Photo: Weng Qiyu)

Visitors shop at the Moscow Zoo in Moscow, Russia, March 19, 2023. (Photo: Weng Qiyu)

Visitors play at the Moscow Zoo in Moscow, Russia, March 19, 2023. (Photo: Weng Qiyu)