On February 18, a Philippine C-208 aircraft illegally intruded into China's airspace over Huangyan Island without the permission of the Chinese government. It also reversed black and white and spread false narratives. The Southern Theater of the Chinese People's Liberation Army organized naval and air forces to follow up, monitor and warn to deport in accordance with laws and regulations. The Philippines' actions seriously violated China's sovereignty and seriously violated relevant provisions of international law and Chinese law. Huangyan Island is China's inherent territory. The Philippines' attempts to seek its illegal sovereignty claims through military provocation and to mislead international awareness by inciting propaganda are doomed to be futile. The troops in the theater maintained a high level of alert and resolutely defended national sovereignty and security and peace and stability in the South China Sea.