Sun Bo, 57, is general manager of the China Shipbuilding Industry Corporation (CSIC), China’s largest state-owned maritime manufacturer, which leads nearly every major shipbuilding project of the Chinese navy. Most notably, Sun headed the decade-long retrofitting of the Liaoning, a Soviet-built aircraft carrier that was commissioned to the Chinese Navy’s Surface Force after the collapse of the Soviet Union.

The ship arrived at the CSIC’s Dalian shipyard in northeastern China in 2002. Work on the vessel was completed in 2012. Today CSIC heads the construction of so-called Type 001A, China’s first home-built aircraft carrier, which is said to be modeled largely on the Liaoning. The company is also spearheading the construction of numerous Chinese Navy frigates, latest-generation destroyers, and numerous other vessels. Earlier this year, it was announced the CSIC would build the Chinese Navy’s first nuclear-powered aircraft carrier.

As the second most senior official of China’s largest and most important shipbuilder, Sun has supervised all of the company’s projects during the past two decades. But Sun effectively disappeared after June 11, when he made his last known public appearance at a CSIC event. On June 17, a brief notice posted on the company’s website stated that Sun had been placed under investigation for “gross violation of laws and [Communist] Party [of China] discipline”. The brief notice said that the probe of Sun’s activities was led by China’s National Supervision Commission and the Communist Party of China’s Central Commissariat for Discipline Inspection, but provided no further details.

It has now been reported by multiple Chinese news websites that Sun is under investigation not simply for graft, but for far more serious activities involving espionage. Specifically, it is claimed that Sun was recruited by the United States Central Intelligence Agency because of his supervisory role in China’s aircraft carrier building programs. He is believed to have provided the CIA with information about the decade-long retrofitting of the Liaoning. More importantly, there are reports that Sun gave the CIA blueprints and other technical specifications of the Type 001A, which is currently under construction at a top-secret facility. The Hong Kong-based English-language news website Asia Times said on Thursday that, given the sensitive nature of the charges against Sun, it is unlikely that the Chinese government would reveal the outcome of the investigation of the CSIC executive.