Emperor penguins swim near China's research icebreaker Xuelong in Antarctica, Dec. 5, 2018. (Photos: Xinhua)

China's research icebreaker Xuelong, also known as the Snow Dragon, is now 44 kilometers away from the Zhongshan station.

Unloading operations have been carried out after the transportation routes were determined.

An emperor penguin swims near China's research icebreaker Xuelong in Antarctica, Dec. 5, 2018.

Adelie penguins are seen near China's research icebreaker Xuelong in Antarctica, Dec. 2, 2018.

Emperor penguins are seen near China's research icebreaker Xuelong in Antarctica, Dec. 5, 2018.

Adelie penguins are seen near China's research icebreaker Xuelong in Antarctica, Dec. 2, 2018.

China's research icebreaker Xuelong, also known as the Snow Dragon, is now 44 kilometers away from the Zhongshan station.

China's research icebreaker Xuelong, also known as the Snow Dragon, is now 44 kilometers away from the Zhongshan station.

Unloading operations have been carried out after the transportation routes were determined.