China's Northwestern Polytechnical University (NPU) conducted a successful flight test of the Feitian 2 hypersonic vehicle, marking a significant milestone in hypersonic flight capabilities. The test utilized a rocket-based combined cycle (RBCC) engine powered by a kerosene-hydrogen peroxide propellant, showcasing advancements in fuel efficiency and weight reduction. The test demonstrated variable-geometry intake operation, thrust-varying acceleration, and autonomous flight capabilities. The RBCC engine integrates air-breathing ramjets, aiming to maximize atmospheric oxygen usage for increased payload capacity and fuel efficiency. Feitian 2's design changes, such as added wings and tail fins, enhance stability and maneuverability at hypersonic speeds. The successful test paves the way for potential applications in both military and civilian domains, offering advancements in hypersonic technology. The RBCC engine's revolutionary concept combines traditional rocket engine advantages with air-breathing ramjets, promising significant advancements in aerospace engineering.