Citizens tour China's icebreaker Xuelong, or "Snow Dragon", at a port in Qingdao, East China's Shandong province, July 1, 2012. About 2,000 citizens visited the Chinese icebreak here Sunday on its open day. Xuelong is set to kick off the country's fifth Arctic expedition from Qingdao on July 2. (Xinhua/Li Ziheng)