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China Pushes Fighter Leap With J-20S Two-Seater and Reported Sixth-Gen Flight Tests

A U.S. assessment says the land-based J-36 and carrier-focused J-50 have entered flight testing, pointing to a shift toward networked, AI-driven air combat in the next decade.

Overview

  • China publicly displayed and officially declassified the two-seat J-20S, which state sources describe as adding a dedicated mission commander to manage sensors and direct drones.
  • Open-source imagery reported in 2025 indicates the J-20S is moving toward operational service with frontline PLAAF markings observed on at least one aircraft.
  • A December 2025 U.S. report states China’s sixth-generation J-36 and J-50 programs have progressed into active flight testing with potential mid-2030s operational timelines.
  • Analysts describe the J-36 as a tailless, long-range air-superiority design expected to integrate AI and act as a command node for manned–unmanned teaming.
  • The J-50 is reported as a carrier-optimized concept with structural reinforcements and possible folding wings, aligning with China’s expanding carrier fleet and a J-20 inventory estimated at roughly 300 jets.