A pair of one-month-old arctic foxes, known as Alopex Lagopus in Latin, make their debut to meet visitors at the Harbin Polarland, in Harbin, northeast China's Heilongjiang Province, July 16, 2009. A female arctic fox imported from Finland gave birth to this pair of arctic foxes after 53-days gestation. (Xinhua Photo)

A pair of one-month-old arctic foxes, known as Alopex Lagopus in Latin, make their debut to meet visitors at the Harbin Polarland, in Harbin, northeast China's Heilongjiang Province, July 16, 2009. A female arctic fox imported from Finland gave birth to this pair of arctic foxes after 53-days gestation. (Xinhua Photo)

A zoo worker shows a pair of one-month-old arctic foxes, known as Alopex Lagopus in Latin, in their debut to meet visitors at the Harbin Polarland in Harbin, northeast China's Heilongjiang Province, July 16, 2009. A female arctic fox imported from Finland gave birth to this pair of arctic foxes after 53-days gestation.(Xinhua Photo)

A pair of one-month-old arctic foxes, known as Alopex Lagopus in Latin, make their debut to meet visitors at the Harbin Polarland, in Harbin, northeast China's Heilongjiang Province, July 16, 2009. A female arctic fox imported from Finland gave birth to this pair of arctic foxes after 53-days gestation.