Researchers of China's icebreaker Xuelong, or "Snow Dragon", work on ice in the Arctic Ocean, Aug. 4, 2016. The research team of China's seventh expedition set up its first ice station and began working on Thursday. (Xinhua/Wu Yue)

Researchers of China's icebreaker Xuelong, or "Snow Dragon", work on ice in the Arctic Ocean, Aug. 4, 2016. The research team of China's seventh expedition set up its first ice station and began working on Thursday. (Xinhua/Wu Yue)

A research boat is lowered from China's icebreaker Xuelong, or "Snow Dragon", to begin an expedition in the Arctic Ocean, Aug. 4, 2016. The research team of China's seventh expedition set up its first ice station and began working on Thursday. (Xinhua/Wu Yue)