#China's 3D-printed minimalist turbojet engine completed its first single-engine flight test, marking a significant breakthrough in the engineering use of 3D-printed engines, CMG learned on November 13, 2025. The turbojet engine was independently developed by the Aero Engine Corporation of China (AECC). The flight test lasted 30 minutes, reached an altitude of 6,000 meters, and achieved a maximum speed of Mach 0.75. The test demonstrates the engine's improved reliability at higher altitudes and