China has conducted a trial run on the country's first permanent magnet propulsion motor for naval vessels, with experts saying that it marks a significant breakthrough in the country's naval vessel building industry, especially for the nuclear submarines.

Chinese military experts say they believe the motor is specially designed for China's submarines and can substantially improve their performance in many aspects, especially by significantly reducing their running sound to the lowest possible level.

The new high_performance permanent magnet motors made from rare_earth materials avoid the flaws of traditional motors that work under the excitation principle, and can provide much greater power density, and can significantly reduce its working noise.

The navy was supplying its newest nuclear attack submarines with a "shaftless," rim_driven pump_jet, which was considered a revolutionary, low_noise propulsion system.