Today, 30 years ago, on April 13, 1995 (March 14, 1995) New China's first ultrasonic unmanned aircraft test flight was successful. On April 13, 1995, China's first ultrasonic unmanned aircraft tested successfully at an Air Force test base. This marks the development of China's unmanned aircraft has entered the world's front line. This ultrasonic unmanned aircraft was successfully developed by an Air Force test base for four years. The aircraft under the remote command of ground personnel can complete various movements such as landing, jumping, swing, ultra-low air flight. The aircraft's performance indicators are designed to meet the requirements. The success of this ultrasonic unmanned aircraft development, provides a brand new means for the test of new Chinese air weapons and the troops' practical targeting training.