Aerial photo taken on Nov. 4, 2019 shows China's polar icebreaker Xuelong 2, or Snow Dragon 2, preparing to dock in the port of Hobart, Australia. After a 20-day voyage, the Chinese icebreaker on China's 36th Antarctic research expedition docked in Australia's port of Hobart on Monday. This is the first time that it has berthed in a foreign port since its maiden voyage started. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows China's polar icebreaker Xuelong 2, or Snow Dragon 2, preparing to dock in the port of Hobart, Australia. After a 20-day voyage, the Chinese icebreaker on China's 36th Antarctic research expedition docked in Australia's port of Hobart on Monday. This is the first time that it has berthed in a foreign port since its maiden voyage started. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows China's polar icebreaker Xuelong 2, or Snow Dragon 2, preparing to dock in the port of Hobart, Australia. After a 20-day voyage, the Chinese icebreaker on China's 36th Antarctic research expedition docked in Australia's port of Hobart on Monday. This is the first time that it has berthed in a foreign port since its maiden voyage started. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows China's polar icebreaker Xuelong 2, or Snow Dragon 2, preparing to dock in the port of Hobart, Australia. After a 20-day voyage, the Chinese icebreaker on China's 36th Antarctic research expedition docked in Australia's port of Hobart on Monday. This is the first time that it has berthed in a foreign port since its maiden voyage started. (Photo: Xinhua)