US military experts have alleged that the designs of China's fifth-generation jet fighter J-31 were stolen from its F-35.Reuters
Dave Majumdar, Scout Warrior: US F-35 & F-22 vs. China's J-30 & J-31
Examples of advanced Chinese weapons that incorporate stolen American know-how include the Chengdu J-20 and Shenyang J-31 stealth fighters and electromagnetic catapult launch systems.
Russia and China will likely use their cyber-warfare and cyber-espionage capabilities to challenge the United States into the foreseeable future.
Both nations possess highly capable forces that can steal information or attack American infrastructure. Indeed, in some cases, highly classified data on some of the United States’ most advanced military hardware—including the Lockheed Martin F-22 Raptor, F-35 Joint Strike Fighters and Bell-Boeing V-22 Osprey—is in now in the hands of foreign adversaries as result of cyber-espionage.
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WNU Editor: They may have the specs on the F-35 .... but the Chinese will need more than just that to field an air-force that can match the U.S.