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Are Russian Su-57, Chinese J-20 Really 5th-Gen Fighter Jets Capable Of Challenging US' F-35 Aircraft?
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China's advanced J-20 stealth fighters are getting an engine upgrade, source says | South China Morning Post
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China's eyeing a 6th-generation fighter to beat the US — its 5th-gen fighters probably don't stand a chance in a fight | Fighter, Us fighter jets, Fighter aircraft
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