Combo photo taken on Dec. 19, 2019 shows China's polar icebreaker Xuelong 2 (up), or Snow Dragon 2, and penguins (bottom) on a floating ice near Xuelong 2 in the Southern Ocean. China's first domestically made polar icebreaker Xuelong 2 came across many polar animals in the Southern Ocean on Thursday during its maiden voyage for the country's 36th Antarctic expedition. (Xinhua/Liu Shiping)