Further test and evaluation of the aircraft was carried out by the PLAAF until early 2004, when the aircraft was officially certified for design finalisation.
人民解放军空军对飞机的更进一步测试与评估持续到2004年的早些时候，此时飞机的最终生产型已经正式取得定型许可。
The PLAAF began to search for a successor to its forty-year-old CJ-6 basic trainer as early as 1993.
早在1993年PLAAF开始去寻找它服役四十年之久的CJ-6初级教练机的替代者。
The theoretical evaluation of the next generation basic trainer was completed by the PLAAF and Hongdu in 2003.
下一代初级教练机的理论评估在2003年被PLAAF和洪都公司完成了。
The PLA Air Force (PLAAF) has converted some of its retired Jian-7 fighters into unmanned target drone to simulate enemy aircraft in air-to-air and surface-to-air weapon testing.
PLA空军（PLAAF）已经把一些退役歼-7战斗机改装成无人靶机，在空对空和地对空武器测试中去模拟敌方飞机。
The PLA Air Force (PLAAF) has converted some of its retired Jian-7 fighters into unmanned target drone to simulate enemy aircraft in air-to-air and surface-to-air weapon testing.
PLA空军（PLAAF）已经把一些退役歼-7战斗机改装成无人靶机，在空对空和地对空武器测试中去模拟敌方飞机。
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