China's stealth fighter may be getting a new engine

Images that just surfaced online show a new-built J-20 with stealthy WS-10

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turbofan engines, which are developed and manufactured in China. These engines are distinguished by their serrated afterburner nozzles and interior flaps for manipulating the exhaust flow.

Once these new J-20s enter service, China will have comprehensively mastered the major parts of fighter technology, including radars, stealthy fuselage, missiles, computers, and engines.