Aerial photo taken on Nov. 21, 2019 shows China's polar icebreaker Xuelong 2 (R) and another icebreaker, Xuelong, sailing at the new broken-through path at the waters near the Zhongshan Station in Antarctica. China's polar icebreakers Xuelong and Xuelong 2 on Wednesday reached the waters near the Zhongshan Station in Antarctica. (Xinhua/Liu Shiping)