Two Siberian tigers rest in the Heilongjiang Siberian Tiger Park, Northeast China’s Heilongjiang province, on March 22, 2013. It is thought more than 100 new Siberian tiger cubs could be born in the park, the world's biggest Siberian tiger breeding base. At present, all Siberian tigers of child-bearing age have completed their mating, according to the park which currently has more than 1,000 Siberian tigers. [Photo/Xinhua]

People in Chongqing say goodbye to Ershun, one of a pair of pandas that will leave China for Canada on March 25 and stay for 10 years, on March 23, 2013. They will be the first pair of pandas to visit Canada since the 1980s. [Photo/China News Service]