This is almost certainly impossible. China’s aviation-engine development has long relied heavily on Soviet and Russian technology, including imitation, licensed production, and reverse engineering of engines such as the AL-31F and related designs. Therefore, Chinese claims alone are not sufficient to prove that this aircraft is actually using a fully indigenous engine rather than a Russian engine or a derivative based heavily on Russian technology.
Even if Chinese sources label the engine as “domestically produced,” that is still essentially a one-sided claim unless it is supported by convincing independent evidence. Without such evidence, there is no solid basis for concluding that the aircraft is powered by a genuinely independent Chinese design instead of a Russian-origin engine. China has historically depended heavily on Russian technology in the field of high-performance military jet engines, so claims of a completely indigenous engine should be treated with considerable skepticism.
For these reasons, this specification should not exist in the first place, and the data shown here should be regarded as fabricated, misleading, or otherwise unreliable unless strong independent evidence can verify it.
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