A polar bear feeds on exclusive "sweet dumplings", made of ice puddings stuffed with fish, fruit and vegetable mashes, at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.

A polar bear catches fish at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders. (Photo: Xinhua)

Polar bears play with a tire collar at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.

Polar bears feed on exclusive "sweet dumplings", made of ice puddings stuffed with fish, fruit and vegetable mashes, at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.

A polar bear feeds on exclusive "sweet dumplings", made of ice puddings stuffed with fish, fruit and vegetable mashes, at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying the exclusive "sweet dumplings" made by breeders.

Polar bears feed on exclusive "sweet dumplings", made of ice puddings stuffed with fish, fruit and vegetable mashes, at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.

A polar bear feeds on exclusive "sweet dumplings", made of ice puddings stuffed with fish, fruit and vegetable mashes, at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.

A polar bear plunges into water at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.

A polar bear catches fish at Haichang ocean park in east China's Shanghai, Feb. 19, 2019, on the occasion of the Chinese traditional Lantern Festival. Two polar bears named "Yatou" and "Pizu" on Tuesday celebrated the festival by enjoying exclusive "sweet dumplings" made by breeders.