Group 1 - The article reports on the crash of two U.S. military aircraft in the South China Sea, with President Trump suggesting that fuel quality may be a factor in the incidents [1] - The U.S. Navy confirmed that an MH-60R Seahawk helicopter and an F/A-18F Super Hornet crashed after taking off from the USS Nimitz, with all crew members safely rescued [1][2] - China's Foreign Ministry expressed willingness to provide necessary assistance from a humanitarian perspective if requested by the U.S., while emphasizing that U.S. military activities in the South China Sea contribute to regional security issues [2]

（原标题：两架美军机在南海相继坠毁，中方回应） 来源：长安街知事 郭嘉昆表示，如果美方提出，中方愿意从人道主义的角度出发，向美方提供必要的协助。 郭嘉昆强调，美方有关军机是在南海开展军事演练时坠毁的。美方频繁派遣军舰军机到南海炫耀武力， 是引发海上安全问题、破坏地区和平稳定的根源。 10月27日，外交部发言人郭嘉昆主持例行记者会。 彭博社记者提问，美国一架军用直升机和一架战斗机在不到30分钟的时间里分别在南海坠毁，外交部对 此有何评论？ ...