Summary and Key Points: China's Shenyang FC-31 Gyrfalcon, also known as the J-31 or J-35, is often compared to the US F-35 Lightning II, with accusations of technology theft.
-The J-31B variant, recently showcased in a promotional video, is designed for the People's Liberation Army Navy's aircraft carriers, including the new Type 003 Fujian with its electromagnetic catapults.
-The aircraft has evolved significantly, with the J-31B being larger and more capable than the original FC-31.