Working staff dressed in traditional clothes cook for tourists during the 25th Harbin Sun Island International Snow Sculpture Art Expo. in Harbin, capital of northeast China's Heilongjiang Province, Dec. 21, 2012. The expo kicked off on Friday. (Xinhua/Wang Feng)

A working staff invites a tourist to taste the Chinese sauerkraut during the 25th Harbin Sun Island International Snow Sculpture Art Expo. in Harbin, capital of northeast China's Heilongjiang Province, Dec. 21, 2012. The expo kicked off on Friday. (Xinhua/Wang Feng)

Tourists play on the snow ground at the 25th Harbin Sun Island International Snow Sculpture Art Expo. in Harbin, capital of northeast China's Heilongjiang Province, Dec. 21, 2012. The expo kicked off on Friday. (Xinhua/Wang Feng)

Folk artists perform at the 25th Harbin Sun Island International Snow Sculpture Art Expo. in Harbin, capital of northeast China's Heilongjiang Province, Dec. 21, 2012. The expo kicked off on Friday. (Xinhua/Wang Feng)