A helicopter transports goods and materials from China's research icebreaker Xuelong, or Snow Dragon, to Zhongshan station in the Antarctic, Dec. 28, 2017. Members of China's Antarctic expedition began to unload goods and materials from Xuelong to Zhongshan station in the Antarctic. Xuelong set sail from Shanghai, east China, on Nov. 8, beginning the country's 34th Antarctic expedition. (Xinhua/Bai Guolong)