两架美军机相继在南海坠毁，中方回应

Group 1 - The article discusses a recent incident involving the crash of a U.S. military helicopter and fighter jet in the South China Sea, highlighting the geopolitical tensions in the region [2] - The Chinese Foreign Ministry spokesperson, Guo Jia Kun, expressed willingness to provide humanitarian assistance to the U.S. if requested, indicating a potential for cooperation despite tensions [2] - Guo emphasized that the frequent deployment of U.S. military assets in the South China Sea is a root cause of maritime security issues and undermines regional peace and stability [2]