Photo taken on Feb. 3, 2019 shows a seal cub born on Saturday at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province. [Photo: Xinhua]"

Photo taken on Feb. 3, 2019 shows a 15-year-old seal mother (R) and her seal cub born on Saturday at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province. [Photo: Xinhua]"

Photo taken on Feb. 3, 2019 shows a seal cub born on Saturday at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province. [Photo: Xinhua]"

Photo taken on Feb. 3, 2019 shows a seal cub born on Saturday at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province. [Photo: Xinhua]"

Photo taken on Feb. 3, 2019 shows a seal cub born on Saturday at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province. [Photo: Xinhua]"

Photo taken on Feb. 3, 2019 shows a 15-year-old seal mother (L) and her seal cub born on Saturday at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province. [Photo: Xinhua]"