China's Xuelong 2 conducts scientific research in Cosmonauts Sea (1/5)

Photo taken on Dec. 27, 2019 shows the krill samples collected by China's 36th Antarctic expedition team aboard China's polar icebreaker Xuelong 2 in the Cosmonauts Sea. (Xinhua/Liu Shiping)

Photo taken on Dec. 27, 2019 shows the krill samples collected by China's 36th Antarctic expedition team aboard China's polar icebreaker Xuelong 2 in the Cosmonauts Sea. (Xinhua/Liu Shiping)

Wang Xinliang, a member of China's 36th Antarctic expedition team, processes krill samples aboard China's polar icebreaker Xuelong 2, Jan. 7, 2020. (Xinhua/Liu Shiping)

Aerial photo taken on Jan. 7, 2020 shows China's polar icebreaker Xuelong 2, or Snow Dragon 2, conducting scientific research in the Cosmonauts Sea. (Xinhua/Liu Shiping)

Members of China's 36th Antarctic expedition team take back the trawl used for collecting krill samples aboard China's polar icebreaker Xuelong 2, Jan. 7, 2020. (Xinhua/Liu Shiping)