China's research icebreaker Xuelong enters Antarctic Circle

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Staff members work on a KA32 helicopter that is prepared for the upcoming unloading operations on China's research icebreaker Xuelong, also known as the Snow Dragon, on Nov. 29, 2018. The icebreaker is on China's 35th Antarctic research expedition and has entered the Antarctic Circle on Thursday and will carry out unloading operations the next day. (Xinhua/Liu Shiping)