2012年10月31日上午10时32分，由中航工业沈飞研制的AMF五代战机成功首飞。中国成为世界第二个同时试飞两种五代机原型机的国家。此前，只有美国同时研制了F-22和F-35两种五代机。[超大军事]
China's J-31, a new advanced multipurpose fighter prototype developed by AVIC Shenyang Aircraft Corp., made its successful maiden flight Oct. 31, making China the second country after the United States to operate two fifth-generation fighter jets. The U.S.'s fifth-generation fighters, the F-22 and F-35, are both currently in service. [Photo: cjdby.net]