China's research icebreaker Xuelong sails in waters near the West Ice Shelf in Antarctica, on Feb. 15, 2019. China's research icebreaker Xuelong, with 126 crew members aboard on the 35th Antarctic research mission, on Thursday local time left the Zhongshan Station on its way back to China. It is expected to arrive in Shanghai in mid-March. (Xinhua/Liu Shiping)