A vet listens to the internal workings of a ring-tailed lemur at a wild zoo in Qingdao, eastern China’s Shandong Province on November 21, 2017. /Xinhua Photo

The annual health check-up takes place to make sure all the animals are healthy enough to make it through the winter. Here, a vet checks a pregnant alpaca. /Xinhua Photo

The zoo is feeding animals with high protein and high calorie foods to ensure they take in sufficient nutrition for the cold days. This photo shows a Siberian tiger having a dental check-up. /Xinhua Photo