China's newest South China Sea tactic is not a carrier strike group — it is a trainer jet with live missiles and a targeting crosshair. The People's Liberation Army Southern Theatre Command released weekend footage of at least three JL-10 advanced trainers, armed with PL-5 short-range air-to-air missiles, locking electronic systems onto three Philippine light aircraft over disputed Bajo de Masinloc (Scarborough Shoal) on 2 September.

The video identifies the Philippine aircraft as a BN-2A Islander, a C-208 turboprop and a PA-31T, and shows a green targeting crosshair tracking one of them. A Chinese pilot is heard warning in Chinese and English that the aircraft had "intruded into the territorial airspace of China's Huangyan Dao" and must leave immediately or face measures. The PLA said readiness patrols around the shoal have run since August to tighten control and counter what it calls rights violations.

Heavier metal was in the frame too: the same package showed a J-16 multirole fighter, an H-6K bomber and Chinese naval vessels. The encounter followed a Philippine aerial patrol with the same light aircraft types over the shoal on 21 August — a reminder that Manila keeps flying even as Beijing treats the feature as settled Chinese territory.

Scarborough has been under effective Chinese control since 2012. Beijing published territorial-sea baselines around the atoll in 2024; the Philippines filed its own baselines with the United Nations in July and rejects China's claim. Analysts reading the PLA clip argue armed trainers may be a cheaper, more frequent intercept tool than burning fighter hours on every Philippine patrol.

For Manila, the distinction between a surveillance pass and a missile-armed radar lock is the story. For the wider Indo-Pacific, Scarborough is again proving that "gray zone" is a polite phrase for airspaces where one side paints the other's aircraft as targets — and releases the video.