Three seal pups enter "seal kindergarten" at Harbin Polarland

​A seal pup is seen in water at the Harbin Polarland in Harbin, northeast China's Heilongjiang Province, on April 29, 2019. Three seal pups entered a "seal kindergarten", which was put into service at Harbin Polarland recently. All three are less than 3 months old and will play and grow together. [Photo: Xinhua]