A South Korean naval officer has been charged with passing classified data on naval destroyers to a Chinese agent.

By 대한민국 국군 Republic of Korea Armed Forces (2008년9월27일 해군 세종대왕함기동 (1)) [CC BY-SA 2.0], via Wikimedia Commons

The lieutenant-commander was believed to have been recruited while he was studying in China between August 2009 and July 2012.

Source