http://www.thedrive.com/the-war-zone/18163/this-is-our-best-view-yet-of-chinas-ship-mounted-railgun-prototype

If this is indeed a railgun, the idea that China could put a weapon as advanced as this to sea—even in an experimental form—should serve as a huge gut check for the Pentagon which has chronically underestimated the Beijing's ability to field advanced weapons over the last decade.