China's research vessel Xuelong (Snow Dragon) leaves the Qingdao Olympic Sailing Center in Qingdao, east China's Shandong Province, on July 2, 2012 for its fifth Arctic expedition. Xuelong will travel an estimated 17,000 nautical miles during its 90-day voyage, with a five-day visit to Iceland. It is scheduled to return to Shanghai on September 29 (XINHUA) |