Song Zhenya (1st R), member of China's research vessel Xuelong, or "Snow Dragon," bids farewell with his family at the port of Qingdao Olympic Sailing Center for the fifth Arctic expedition in Qingdao, east China's Shandong Province, July 2, 2012. Xuelong, an A-2 class icebreaker capable of breaking ice 1.2 meters thick, is estimated to travel over 17,000 nautical miles during its 90-day voyage. It is scheduled to return to Shanghai on Sept. 29. [Xinhua]