Photo taken on March 11, 2014 shows a tiger cub kissing its mother in Daqingshan Safari Park in Hohhot, capital of north China's Inner Mongolia Autonomous Region. Three siberian tiger cubs, one female and two male, have been allowed to meet visitors for the first time since they were born in October last year. (Xinhua/Wang Zheng)

Photo taken on March 11, 2014 shows a tiger cub with its mother in Daqingshan Safari Park in Hohhot, capital of north China's Inner Mongolia Autonomous Region. Three siberian tiger cubs, one female and two male, have been allowed to meet visitors for the first time since they were born in October last year. (Xinhua/Wang Zheng)

Photo taken on March 11, 2014 shows three siberian tiger cubs in Daqingshan Safari Park in Hohhot, capital of north China's Inner Mongolia Autonomous Region. Three siberian tiger cubs, one female and two male, have been allowed to meet visitors for the first time since they were born in October last year. (Xinhua/Wang Zheng)

Photo taken on March 11, 2014 shows a tiger cub lying by its mother in Daqingshan Safari Park in Hohhot, capital of north China's Inner Mongolia Autonomous Region. Three siberian tiger cubs, one female and two male, have been allowed to meet visitors for the first time since they were born in October last year. (Xinhua/Wang Zheng)

Photo taken on March 11, 2014 shows a tiger cub in Daqingshan Safari Park in Hohhot, capital of north China's Inner Mongolia Autonomous Region. Three siberian tiger cubs, one female and two male, have been allowed to meet visitors for the first time since they were born in October last year. (Xinhua/Wang Zheng)