南部战区、中国海警，同日重磅行动！

Group 1 - The core viewpoint of the article emphasizes the strengthening of military and law enforcement activities by China in the waters surrounding Huangyan Island to safeguard national sovereignty and maintain regional stability [2][3]. Group 2 - On May 31, the Southern Theater Command of the People's Liberation Army organized military forces to conduct readiness patrols in the territorial waters and airspace around Huangyan Island, indicating an increase in military presence in the area [2]. - Since May, the Southern Theater Command has been continuously enhancing patrols and vigilance in the maritime and aerial domains surrounding Huangyan Island, reinforcing control over these areas [2]. - The China Coast Guard also conducted law enforcement patrols in the same region on May 31, focusing on monitoring, warning, and deterring unauthorized activities to protect territorial sovereignty and maritime rights [2].