China's icebreaker Xuelong arrives at the Zhongshan Station, a Chinese research base in Antarctica, Feb. 9, 2019. China's icebreaker Xuelong on Feb. 9 arrived at the Zhongshan Station and started to transfer fuel oil to the station by helicopter. (Xinhua/Liu Shiping)
A helicopter transfers fuel oil to the Zhongshan Station, a Chinese research base in Antarctica, Feb. 9, 2019. China's icebreaker Xuelong on Feb. 9 arrived at the Zhongshan Station and started to transfer fuel oil to the station by helicopter. (Xinhua/Liu Shiping)