ABOARD XUELONG, July 25, 2016 (Xinhua) -- Photo taken on July 25, 2016 shows a GPS navigator equipment on China's icebreaker Xuelong, or "Snow Dragon", on July 25, 2016. "Xuelong" entered the Arctic Circle on Monday. The vessel left a Shanghai port on July 11 for the Arctic, the country's seventh expedition to the polar region. In addition to areas covered by Xuelong's previous Arctic expeditions, the ship will also visit the Mendeleyev Ridge in the Arctic Ocean. (Xinhua/Wu Yue)