Core Viewpoint - The successful return of China's first ice-capable manned deep-sea research mother ship "Exploration No. 3" and the manned submersible "Fighter" after completing a deep-sea mission in the Arctic highlights China's advancements in deep-sea exploration technology and its capability to conduct scientific research in extreme environments [1][4]. Group 1 - The Arctic manned deep-sea research team departed from Sanya on July 22 and conducted operations in the Arctic Ocean for 56 days, collecting valuable water, sediment, rock, and biological samples, which will support research on rapid climate changes in the Arctic [4][10]. - The "Fighter" submersible completed 43 dives in the Arctic, collaborating with the "Dragon" submersible for underwater joint operations, marking a new model for dual manned submersible operations in China [5][8]. - The mission included the first manned deep-sea scientific exploration of the Gakkel Ridge in the Arctic, with the "Fighter" spending an average of over 9 hours underwater per dive and over 6 hours on the seabed [6][10]. Group 2 - The mission faced unique challenges in the Arctic, such as navigating through drifting icebergs and adapting to rapid temperature changes during the polar day and night cycles, which significantly affected the sensitivity of the equipment [10]. - The successful completion of this mission positions China as the only country capable of conducting continuous manned deep-sea dives in densely ice-covered areas of the Arctic [8].

Core Viewpoint - The Chinese scientific research team successfully completed a manned deep-sea diving mission in the Arctic, utilizing the domestically designed and built ice-capable mother ship "Exploration No. 3" and the manned submersible "Fighter" [1][2]. Group 1 - The mission lasted 56 days, starting from July 22, with the "Fighter" completing 43 dives in the Arctic [1]. - The "Dragon" manned submersible achieved China's first manned deep-sea dive in the Arctic ice zone, collaborating underwater with the "Fighter" to innovate a dual submersible operation model [1][2]. - The "Fighter" reached a maximum diving depth of 5,277 meters during the mission, conducting the first manned deep-sea scientific research in the Arctic's Gakkel Ridge [1][2]. Group 2 - The mission validated the operational capabilities and application value of the "Fighter" and "Exploration No. 3" in polar ice regions, achieving significant technological breakthroughs in extreme environment operations [2]. - The research team established operational protocols for the "Fighter" in extreme polar conditions, creating a new mobile ice-diving model for ship-submersible collaboration [2]. - The mission allowed for the collection of valuable water, sediment, rock, and biological samples, providing crucial observational data for studying rapid climate change in the Arctic and the evolution and adaptation mechanisms of polar life [2].

Core Points - China has successfully conducted continuous manned deep-sea diving operations in the Arctic, making it the only country in the world to do so in areas with dense sea ice [1][7] - The mission utilized the "Exploration No. 3," China's first ice-capable manned submersible support vessel, and the "Fighter" manned submersible, completing a total of 43 dive missions [1][3] - The mission included collaboration with the "Jiaolong" manned submersible team, marking China's first deep dive in the Arctic ice zone and establishing a new model for underwater cooperative operations [3][7] Summary by Sections - **Mission Overview** - The Arctic manned deep-sea diving expedition began on July 22, with the team operating in the Arctic Ocean for 56 days [3] - The "Fighter" submersible completed 43 dive missions, while the "Jiaolong" team conducted its first dive in the Arctic ice zone [3][7] - **Scientific Contributions** - The expedition achieved the first manned deep-sea scientific research in the Gakkel Ridge under conditions of over 80% sea ice coverage, reaching a maximum depth of 5,277 meters [3][7] - A variety of valuable samples, including water, sediment, rock, and biological specimens, were collected, providing significant observational data for studying rapid climate changes in the Arctic [7]