# WS-15 Engine

Beyond the Airframe: China's J-20 Fleet Expansion Shifts the Battlefield to the Cockpit

China's J-20 fleet has reportedly surpassed 500 units, prompting Western analysts to shift their skepticism from the aircraft's hardware to the PLAAF's pilot training capacity. To mitigate these concerns, China is utilizing seasoned pilot transitions and the world's first twin-seat stealth fighter to accelerate its air force modernization.