China's polar icebreaker Xuelong 2 breaks ice in the waters in Antarctica, November 22, 2019. [Xinhua/Liu Shiping]

China's polar icebreaker Xuelong (back) follows the other icebreaker Xuelong 2 towards the designated unloading area near the Zhongshan Station in Antarctica, November 23, 2019. [Xinhua/Liu Shiping]

China's polar icebreaker Xuelong 2 breaks ice in the waters in Antarctica, November 22, 2019. [Xinhua/Liu Shiping]

China's polar icebreaker Xuelong 2 breaks ice in the waters in Antarctica, November 22, 2019. [Xinhua/Liu Shiping]

The helicopter unloads cargos from China's polar icebreaker Xuelong in the waters in Antarctica, November 23, 2019. [Xinhua/Liu Shiping]

China's polar icebreaker Xuelong 2 breaks ice in the waters in Antarctica, November 22, 2019. [Xinhua/Liu Shiping]

China's polar icebreaker Xuelong 2 breaks ice in the waters in Antarctica, November 22, 2019. [Xinhua/Liu Shiping]

(Source: Xinhua)