China has demonstrated a next-generation maglev (magnetic levitation) train system capable of reaching around 400 miles per hour (≈650 km/h) in just seven seconds during controlled testing. Unlike conventional rail, maglev trains float above the track using magnetic forces, eliminating wheel-rail friction entirely. The record focuses on acceleration, not sustained cruising speed. Such rapid acceleration is possible because maglev systems distribute force evenly along the train, reducing mechanic

Blink and you'll miss it. Japan’s state-of-the-art maglev train has set a world speed record in a test run near Mount Fuji, clocking more than 600km/h (373mph). The maglev, short for “magnetic levitation”, hovers 10cm (four inches) above the tracks and is propelled by electrically charged magnets. http://gu.com/p/47y3y/fb | The Guardian