After learning about this, Xue Jianqiang spat out a mouthful of old blood 5 meters away. ,Xue Jianqiang said: "The technology level of the 1970s and 1980s is enough, and I don't need anything too advanced. The radar doesn't need to be able to guide anti-aircraft missiles to attack targets, but the distance To detect the enemy, the aircraft must be far away, no less than 200 kilometers."