Ring-tailed lemurs play around in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently. (Photos: Xinhua)

A baby zebra stands beside its mother in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

Mute swans swim in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

Cebus apellas are seen in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

Piglets are seen in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

A baby ring-tailed lemur plays in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

A baby alpaca runs in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

A baby ring-tailed lemur plays in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

A mute swan and its babies swim in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

A baby patas monkey hides behind its mother in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.

Piglets are seen in Shenyang Forest Zoological Garden in Shenyang, capital of northeast China's Liaoning Province, June 4, 2019. Newly-born animal cubs in Shenyang Forest Zoological Garden attracted lots of tourists recently.