China’s icebreaker Xuelong is blocked in Antarctic ice zone, Nov 29, 2016. Chinese research vessel and icebreaker Xuelong (Snow Dragon), which is on its 33rd Antarctic expedition, got held up in ice zone about 31 kilometers away from Zhongshan Station on Nov 29. Expedition team have started to explore the way on ice to find a safe way for unloading at Zhongshan. [Photo/Xinhua]

A researcher of China’s icebreaker Xuelong drills on Antarctic ice zone, Nov 29, 2016. Chinese research vessel and icebreaker Xuelong (Snow Dragon), which is on its 33rd Antarctic expedition, got held up in ice zone about 31 kilometers away from Zhongshan Station on Nov 29. Expedition team have started to explore the way on ice to find a safe way for unloading at Zhongshan.[Photo/Xinhua]

Researchers of China’s icebreaker Xuelong ride snowmobile to explore the way on Antarctic ice zone, Nov 29, 2016. Chinese research vessel and icebreaker Xuelong (Snow Dragon), which is on its 33rd Antarctic expedition, got held up in ice zone about 31 kilometers away from Zhongshan Station on Nov 29. Expedition team have started to explore the way on ice to find a safe way for unloading at Zhongshan.[Photo/Xinhua]

A researcher of China’s icebreaker Xuelong records data on Antarctic ice zone, Nov 29, 2016. Chinese research vessel and icebreaker Xuelong (Snow Dragon), which is on its 33rd Antarctic expedition, got held up in ice zone about 31 kilometers away from Zhongshan Station on Nov 29. Expedition team have started to explore the way on ice to find a safe way for unloading at Zhongshan. [Photo/Xinhua]

A panorama of China’s Zhongshan Station and its surroundings. Chinese research vessel and icebreaker Xuelong (Snow Dragon), which is on its 33rd Antarctic expedition, got held up in ice zone about 31 kilometers away from Zhongshan Station on Nov 29. Expedition team have started to explore the way on ice to find a safe way for unloading at Zhongshan. [Photo/Xinhua]