Emperor penguins walk near China's polar icebreaker Xuelong 2 in the Antarctica's Prydz Bay, Dec. 6, 2019. Team members of China's 36th Antarctic expedition conducted multidisciplinary observations and researches in Antarctica's Prydz Bay from Dec. 3, to Dec. 7. (Xinhua/Liu Shiping)

Emperor penguins walk near China's polar icebreaker Xuelong 2 in the Antarctica's Prydz Bay, Dec. 6, 2019. Team members of China's 36th Antarctic expedition conducted multidisciplinary observations and researches in Antarctica's Prydz Bay from Dec. 3, to Dec. 7. (Xinhua/Liu Shiping)

Emperor penguins dive into the ocean in the Antarctica's Prydz Bay, Dec. 6, 2019. Team members of China's 36th Antarctic expedition conducted multidisciplinary observations and researches in Antarctica's Prydz Bay from Dec. 3, to Dec. 7. (Xinhua/Liu Shiping)

Emperor penguins dive into the ocean in the Antarctica's Prydz Bay, Dec. 6, 2019. Team members of China's 36th Antarctic expedition conducted multidisciplinary observations and researches in Antarctica's Prydz Bay from Dec. 3, to Dec. 7. (Xinhua/Liu Shiping)

Team members of China's 36th Antarctic expedition work on China's polar icebreaker Xuelong 2 in the Antarctica's Prydz Bay, Dec. 6, 2019. Team members of China's 36th Antarctic expedition conducted multidisciplinary observations and researches in Antarctica's Prydz Bay from Dec. 3, to Dec. 7. (Xinhua/Liu Shiping)

Team members of China's 36th Antarctic expedition work on China's polar icebreaker Xuelong 2 in the Antarctica's Prydz Bay, Dec. 6, 2019. Team members of China's 36th Antarctic expedition conducted multidisciplinary observations and researches in Antarctica's Prydz Bay from Dec. 3, to Dec. 7. (Xinhua/Liu Shiping)