The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua

The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua

The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua

The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua

The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua

The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua

The photo shows an iceberg on sea During China's 36th Antarctic expedition, China's first domestically made polar icebreaker Xuelong overcame various difficulties including colliding with icebergs. Photo:Xinhua