A Siberian tiger cub is seen at the Guaipo Siberian Tiger Park in Shenyang, capital of northeast China's Liaoning Province, April 6, 2014. The tiger cub was born ten days ago. (Xinhua/Zhang Wenkui)

A Siberian tiger cub is seen at the Guaipo Siberian Tiger Park in Shenyang, capital of northeast China's Liaoning Province, April 6, 2014. The tiger cub was born ten days ago. (Xinhua/Zhang Wenkui)

A Siberian tiger cub is fed milk at the Guaipo Siberian Tiger Park in Shenyang, capital of northeast China's Liaoning Province, April 6, 2014. The tiger cub was born ten days ago. (Xinhua/Zhang Wenkui)

A Siberian tiger cub is seen at the Guaipo Siberian Tiger Park in Shenyang, capital of northeast China's Liaoning Province, April 6, 2014. The tiger cub was born ten days ago. (Xinhua/Zhang Wenkui)