The icebreaker Snow Dragon docks in the port in Shanghai, east China, June 24, 2010. The Snow Dragon will sail to the port city of Xiamen June 25, where China's fourth scientific expedition is scheduled to leave for the North Pole on July 1, and start the 85-day research expedition. [Xinhua]

A worker conducts the arm of derrick to load goods on the icebreaker Snow Dragon in the port in Shanghai, east China, June 24, 2010. The Snow Dragon will sail to the port city of Xiamen June 25, where China's fourth scientific expedition is scheduled to leave for the North Pole on July 1, and start the 85-day research expedition. [Xinhua]