The cost calculus reveals Beijing's confidence in the status quo. JL-10s cost roughly $30-40M per airframe versus $80-120M for a J-16; if the PLA is rotating to the cheaper airframe, it means Scarborough is no longer a crisis-response theater but a managed presence.
The Philippines' only counter without risking a naval clash is air-to-air capability on its patrol aircraft — but adding missiles to Cessnas would cross Beijing's threshold for escalation. Manila's leverage is now entirely diplomatic: either secure US escort of Philippine patrols (which would force PLA escalation or retreat) or accept that Scarborough remains a Chinese-controlled airspace with Philippine access only on Beijing's sufferance.
Beijing is signaling a long-term occupation posture at Scarborough by rationalizing the air-defense cost structure — swapping expensive heavy fighters for light interceptors optimized against Philippine prop planes.
This suggests China expects the daily standoff to persist for years, not weeks, and has calculated that maintaining permanent air presence matters more than sortie capability. The PLA's documented study of SEAD missiles for anti-shipping missions indicates the light-fighter deployment masks a heavier anti-surface capability held in reserve; the JL-10s are the visible layer, not the ceiling. Watch whether the Philippines responds by upgrading its Cessna loadouts or requesting US-provided maritime patrol aircraft — the current asymmetry (slow unarmed transports vs. fighters) leaves Manila with no escalation ladder short of naval confrontation.
Has the PLA actually reduced sortie frequency at Scarborough since deploying the JL-10s, or are the light fighters supplementing rather than replacing heavy-fighter patrols? The article doesn't distinguish between a strategic pivot and a tactical rotation.
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