A zoo worker massages for the newly born South China tigers in the Wangcheng zoo in Luoyang, central China's Henan Province (file photo taken on May 1, 2009). Their mother "Niuniu", has miraculously given birth to a total of seven tigers since 2009. The three cubs Niuniu just gave birth to this August were shown up to public for the first time on Thursday. [Xinhua/Gao Shanyue]