A seven-year-old tiger gave birth to a female cub on 25 July 2011, which was the first successful breeding of a Siberian tiger in the wild in China.
Less-than-lissom lions have been fed on junk food in captivity, says expert.
Endangered big cat is rescued from black market animal traders.
More than 20 calves born although park keepers say there could be more.
Big cat Leo80M - also called Nikolay - prepares for flight to Moscow and 'noble mission'.
They wear military headgear, raise the flag, carry knives in their mouths, and shoot at a target.
Tigre de Cristal under fire for 'abusing' rare big cat to promote gambling revolution.
Driver spots big cat at side of busy road, alerts police, and young male is tranquillised.
The rare predator was caught after weeks of wandering into a village in Russian Far East.