The China Coast Guard fired flares at a Philippine military aircraft near a contested reef in the South China Sea on September 12, according to reporting cited by Global Times. The aircraft was on a routine patrol run, the kind the Armed Forces of the Philippines has flown for years over reefs it disputes with Beijing, and the flares mark an escalation in the tools used against those flights rather than a new location or a new claimant.

The People's Liberation Army Navy and the China Coast Guard operate under separate chains of command but a shared script in these waters, and the choice of flares over water cannon (Manila's coast guard has logged both from Beijing's vessels over the past two years) reads as a signal calibrated for aircraft rather than ships, or, more precisely, a signal that the same deterrence budget Beijing applies to Philippine coast guard vessels now extends to the aircraft that photograph them. The Armed Forces of the Philippines will log this incident the way it has logged the others, in the file that eventually reaches the Department of Foreign Affairs' protest desk in Manila, and the count on that file, not the flare itself, is what Beijing is managing.